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2016 State Legislative Competitiveness

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There were 5,916 state legislative seats up for election on November 8, 2016, in 44 states. This page analyzes incumbents defeated in those elections. An incumbent may be defeated at two points in an election cycle: during a primary and during a general election.^[1]

In 2016, 362 incumbents lost their re-election bids: 237 in general elections and 125 in primaries.^[2] This was the smallest number of incumbents defeated in even-year state legislative elections since Ballotpedia began gathering data in 2010.

On this page, you will find:

Incumbents defeated in general elections
Incumbents defeated in primaries
State-by-state breakdowns

Incumbents defeated in general elections

In state legislative general elections, 237 incumbents lost to challengers, 5.0% of incumbents running for re-election. This was the smallest percentage of incumbents defeated in even-year state legislative elections since Ballotpedia began gathering data in 2010.

In 2016 general elections:

131 Democratic incumbents lost, 6.2% of the 2,120 Democratic incumbents who ran and 10.8% of the 1,209 contested Democratic incumbents.

103 Republican incumbents lost, 3.9% of the 2,629 Republican incumbents who ran and 5.9% of the 1,735 contested Republican incumbents.

Three minor party or independent incumbents lost, 25.0% of the 12 minor party or independent incumbents who ran and 33.3% of the nine contested minor party or independent incumbents.

The total number of incumbents defeated in general elections—237—was a 6% decrease from 2014 (251).

In 2016

Click [show] on the table below to view general election incumbent defeat statistics by state in 2016. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in general elections, 2016
State
	Democratic			Republican			Total
	Filed	Def.	%	Filed	Def.	%	Filed	Def.	%
Nationwide	2,120	131	6.2%	2,629	103	3.9%	4,761	237	5.0%
Alaska	16	0	0.0%	19	2	10.5%	36	2	5.6%
Arizona	23	2	8.7%	37	2	5.4%	60	4	6.7%
Arkansas	34	6	17.6%	64	0	0.0%	98	6	6.1%
California	51	2	3.9%	23	3	13.0%	74	5	6.8%
Colorado	26	0	0.0%	31	4	12.9%	57	4	7.0%
Connecticut	94	8	8.5%	68	2	2.9%	162	10	6.2%
Delaware	31	1	3.2%	19	0	0.0%	50	1	2.0%
Florida	25	2	8.0%	72	1	1.4%	97	3	3.1%
Georgia	68	1	1.5%	141	3	2.1%	209	4	1.9%
Hawaii	52	0	0.0%	8	2	25.0%	60	2	3.3%
Idaho	17	2	11.8%	72	0	0.0%	89	2	2.2%
Illinois	90	5	5.6%	53	1	1.9%	143	6	4.2%
Indiana	29	0	0.0%	76	1	1.3%	105	1	1.0%
Iowa	49	7	14.3%	61	0	0.0%	110	7	6.4%
Kansas	33	0	0.0%	84	11	13.1%	117	11	9.4%
Kentucky	56	17	30.4%	51	1	2.0%	107	18	16.8%
Maine	69	8	11.6%	78	5	6.4%	147	13	8.8%
Massachusetts	145	0	0.0%	40	0	0.0%	185	0	0.0%
Michigan	32	1	3.1%	36	0	0.0%	68	1	1.5%
Minnesota	80	9	11.3%	89	2	2.2%	169	11	6.5%
Missouri	32	0	0.0%	104	0	0.0%	137	1	0.7%
Montana	35	2	5.7%	42	3	7.1%	77	5	6.5%
Nebraska	4	0	0.0%	8	5	62.5%	13	5	38.5%
Nevada	21	0	0.0%	17	6	35.3%	39	7	17.9%
New Hampshire	128	11	8.6%	169	12	7.1%	297	23	7.7%
New Mexico	52	1	1.9%	51	7	13.7%	103	8	7.8%
New York	126	1	0.8%	64	1	1.6%	190	2	1.1%
North Carolina	57	3	5.3%	95	3	3.2%	152	6	3.9%
North Dakota	21	15	71.4%	31	2	6.5%	52	17	32.7%
Ohio	28	1	3.6%	59	0	0.0%	87	1	1.1%
Oklahoma	20	0	0.0%	61	0	0.0%	81	0	0.0%
Oregon	30	0	0.0%	28	0	0.0%	58	0	0.0%
Pennsylvania	83	4	4.8%	122	2	1.6%	205	6	2.9%
Rhode Island	85	1	1.2%	13	1	7.7%	99	2	2.0%
South Carolina	56	0	0.0%	88	0	0.0%	144	0	0.0%
South Dakota	10	1	10.0%	50	1	2.0%	60	2	3.3%
Tennessee	25	1	4.0%	81	1	1.2%	106	2	1.9%
Texas	53	0	0.0%	90	4	4.4%	144	5	3.5%
Utah	13	1	7.7%	63	1	1.6%	76	2	2.6%
Vermont	88	6	6.8%	57	4	7.0%	151	10	6.6%
Washington	51	0	0.0%	51	3	5.9%	102	3	2.9%
West Virginia	34	8	23.5%	56	6	10.7%	90	14	15.6%
Wisconsin	39	2	5.1%	63	0	0.0%	102	2	2.0%
Wyoming	9	2	22.2%	44	1	2.3%	53	3	5.7%

Historical comparison

The chart below shows a partisan breakdown of incumbents defeated in general elections from 2010 to 2016.

Click [show] on the table below to view general election incumbent defeat statistics by state from 2010 to 2016. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in general elections, 2010-2016
State
	2010		2012		2014		2016
	Def.	%	Def.	%	Def.	%	Def.	%
Nationwide	495	10.2%	287	6.3%	251	5.1%	237	5.0%
Alabama	22	19.5%	-	-	4	3.6%	-	-
Alaska	3	6.7%	9	17.3%	1	2.2%	2	5.6%
Arizona	6	12.8%	4	7.0%	2	3.1%	4	6.7%
Arkansas	6	9.5%	6	7.1%	10	12.0%	6	6.1%
California	0	0.0%	3	5.4%	4	6.0%	5	6.8%
Colorado	7	10.9%	4	7.8%	6	10.2%	4	7.0%
Connecticut	13	7.8%	4	2.5%	10	6.2%	10	6.2%
Delaware	3	6.4%	3	6.0%	2	4.3%	1	2.0%
Florida	5	5.3%	5	4.7%	5	4.1%	3	3.1%
Georgia	3	1.6%	3	1.5%	0	0.0%	4	1.9%
Hawaii	1	1.8%	3	4.5%	0	0.0%	2	3.3%
Idaho	2	2.2%	2	3.0%	2	2.3%	2	2.2%
Illinois	7	5.6%	5	3.6%	1	0.8%	6	4.2%
Indiana	10	9.0%	5	4.9%	6	5.2%	1	1.0%
Iowa	18	17.1%	8	8.3%	5	4.6%	7	6.4%
Kansas	13	11.8%	14	13.1%	3	2.8%	11	9.4%
Kentucky	8	7.3%	4	3.8%	4	3.8%	18	16.8%
Maine	20	14.4%	17	14.0%	13	10.2%	13	8.8%
Maryland	3	2.0%	-	-	7	5.6%	-	-
Massachusetts	10	6.1%	2	1.1%	3	1.7%	0	0.0%
Michigan	9	13.2%	5	5.7%	2	2.1%	1	1.5%
Minnesota	34	19.4%	16	10.5%	11	9.2%	11	6.5%
Missouri	12	11.8%	6	5.1%	5	3.4%	1	0.7%
Montana	10	13.7%	8	10.1%	6	7.9%	5	6.5%
Nebraska	2	9.5%	1	6.3%	0	0.0%	5	38.5%
Nevada	2	8.0%	1	2.9%	7	16.3%	7	17.9%
New Hampshire	88	28.3%	78	26.6%	46	15.1%	23	7.7%
New Mexico	7	10.8%	8	9.4%	6	10.3%	8	7.8%
New York	11	6.0%	4	2.1%	4	2.1%	2	1.1%
North Carolina	20	13.7%	6	5.1%	5	3.2%	6	3.9%
North Dakota	12	21.1%	6	10.5%	3	5.1%	17	32.7%
Ohio	13	15.1%	2	2.0%	3	3.5%	1	1.1%
Oklahoma	6	5.9%	0	0.0%	1	1.1%	0	0.0%
Oregon	4	5.9%	4	6.3%	2	3.4%	0	0.0%
Pennsylvania	9	4.3%	1	0.5%	4	2.0%	6	2.9%
Rhode Island	4	4.5%	4	4.3%	7	6.9%	2	2.0%
South Carolina	3	2.8%	2	1.4%	1	0.9%	0	0.0%
South Dakota	9	13.0%	4	6.1%	3	4.1%	2	3.3%
Tennessee	13	12.5%	2	2.3%	2	2.1%	2	1.9%
Texas	21	13.9%	3	2.2%	2	1.4%	5	3.5%
Utah	6	7.6%	2	2.9%	1	1.4%	2	2.6%
Vermont	6	3.8%	6	3.9%	11	7.2%	10	6.6%
Washington	9	8.8%	3	3.1%	4	3.6%	3	2.9%
West Virginia	5	5.1%	8	8.3%	23	23.5%	14	15.6%
Wisconsin	13	14.1%	5	5.4%	3	3.4%	2	2.0%
Wyoming	7	11.7%	1	1.8%	1	1.7%	3	5.7%

Incumbents defeated in primaries

In state legislative primaries, 125 incumbents lost to challengers, 2.6% of incumbents running for re-election. This was less than in 2014 (131) and 2012 (197) but more than in 2010 (116).

In 2016 primaries:

40 Democratic incumbents lost, 1.8% of the 2,168 Democratic incumbents who ran and 10% of the 402 contested Democratic incumbents.

85 Republican incumbents lost, 3.1% of the 2,707 Republican incumbents who ran and 14.6% of the 582 contested Republican incumbents.

The total number of incumbents defeated in primaries—125—was a 5% decrease from 2014 (131).

In 2016

Click [show] on the table below to view primary incumbent defeat statistics by state in 2016. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in primaries, 2016
State
	Democratic			Republican			Total
	Filed	Def.	%	Filed	Def.	%	Filed	Def.	%
Nationwide	2,168	40	1.8%	2,707	85	3.1%	4,887	125	2.6%
Alaska	18	2	11.1%	22	3	13.6%	41	5	12.2%
Arizona	26	3	11.5%	38	1	2.6%	64	4	6.3%
Arkansas	36	1	2.8%	66	1	1.5%	102	2	2.0%
California	51	0	0.0%	23	0	0.0%	74	0	0.0%
Colorado	26	0	0.0%	33	2	6.1%	59	2	3.4%
Connecticut	96	2	2.1%	68	0	0.0%	164	2	1.2%
Delaware	31	0	0.0%	19	0	0.0%	50	0	0.0%
Florida	26	0	0.0%	72	0	0.0%	98	0	0.0%
Georgia	71	3	4.2%	143	2	1.4%	214	5	2.3%
Hawaii	53	1	1.9%	8	0	0.0%	61	1	1.6%
Idaho	17	0	0.0%	79	7	8.9%	96	7	7.3%
Illinois	92	1	1.1%	52	0	0.0%	144	1	0.7%
Indiana	30	0	0.0%	78	2	2.6%	108	2	1.9%
Iowa	50	1	2.0%	62	0	0.0%	112	1	0.9%
Kansas	34	1	2.9%	98	14	14.3%	132	15	11.4%
Kentucky	57	1	1.8%	52	1	1.9%	109	2	1.8%
Maine	69	0	0.0%	80	1	1.3%	149	1	0.7%
Massachusetts	147	2	1.4%	40	0	0.0%	187	2	1.1%
Michigan	32	0	0.0%	36	0	0.0%	68	0	0.0%
Minnesota	82	2	2.4%	91	2	2.2%	173	4	2.3%
Missouri	35	2	5.7%	106	2	1.9%	142	4	2.8%
Montana	36	0	0.0%	44	2	4.5%	80	2	2.5%
Nebraska	4	0	0.0%	9	1	11.1%	14	1	7.1%
Nevada	21	0	0.0%	19	2	10.5%	41	2	4.9%
New Hampshire	128	0	0.0%	179	10	5.6%	307	10	3.3%
New Mexico	52	1	1.9%	50	0	0.0%	102	1	1.0%
New York	129	3	2.3%	65	0	0.0%	194	3	1.5%
North Carolina	57	1	1.8%	93	1	1.1%	150	2	1.3%
North Dakota	21	0	0.0%	33	2	6.1%	54	2	3.7%
Ohio	28	0	0.0%	58	1	1.7%	86	1	1.2%
Oklahoma	20	0	0.0%	64	3	4.7%	84	3	3.6%
Oregon	30	0	0.0%	28	0	0.0%	58	0	0.0%
Pennsylvania	89	4	4.5%	120	0	0.0%	209	4	1.9%
Rhode Island	91	6	6.6%	13	0	0.0%	105	6	5.7%
South Carolina	57	1	1.8%	96	8	8.3%	153	9	5.9%
South Dakota	10	0	0.0%	53	2	3.8%	63	2	3.2%
Tennessee	26	0	0.0%	83	2	2.4%	109	2	1.8%
Texas	54	0	0.0%	95	5	5.3%	150	5	3.3%
Utah	13	0	0.0%	63	3	4.8%	76	3	3.9%
Vermont	88	0	0.0%	58	1	1.7%	152	1	0.7%
Washington	52	1	1.9%	51	0	0.0%	103	1	1.0%
West Virginia	35	1	2.9%	58	1	1.7%	93	2	2.2%
Wisconsin	39	0	0.0%	63	0	0.0%	102	0	0.0%
Wyoming	9	0	0.0%	46	3	6.5%	55	3	5.5%

Historical comparison

The chart below shows a partisan breakdown of incumbents defeated in primaries from 2010 to 2016.

Click [show] on the table below to view primary incumbent defeat statistics by state from 2010 to 2016. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in primaries, 2010-2016
State
	2010		2012		2014		2016
	Def.	%	Def.	%	Def.	%	Def.	%
Nationwide	116	2.3%	197	4.1%	131	2.6%	125	2.6%
Alabama	6	5.0%	-	-	8	6.7%	-	-
Alaska	0	0.0%	2	3.7%	2	4.3%	5	12.2%
Arizona	4	7.8%	3	5.0%	2	3.0%	4	6.3%
Arkansas	1	1.6%	2	2.3%	4	4.6%	2	2.0%
California	0	0.0%	0	0.0%	0	0.0%	0	0.0%
Colorado	0	0.0%	2	3.8%	0	0.0%	2	3.4%
Connecticut	1	0.6%	4	2.5%	2	1.2%	2	1.2%
Delaware	1	2.1%	3	5.7%	2	4.1%	0	0.0%
Florida	1	1.0%	3	2.7%	1	0.8%	0	0.0%
Georgia	5	2.5%	12	5.7%	7	3.2%	5	2.3%
Hawaii	1	1.7%	5	7.0%	3	5.2%	1	1.6%
Idaho	6	6.3%	3	4.3%	6	6.4%	7	7.3%
Illinois	1	0.8%	6	4.1%	3	2.4%	1	0.7%
Indiana	2	1.8%	0	0.0%	3	2.6%	2	1.9%
Iowa	2	1.9%	3	3.0%	0	0.0%	1	0.9%
Kansas	5	4.3%	20	15.7%	3	2.7%	15	11.4%
Kentucky	2	1.8%	1	0.9%	2	1.9%	2	1.8%
Maine	1	0.7%	0	0.0%	0	0.0%	1	0.7%
Maryland	11	6.8%	-	-	12	8.7%	-	-
Massachusetts	1	0.6%	4	2.1%	1	0.6%	2	1.1%
Michigan	0	0.0%	5	5.4%	1	1.0%	0	0.0%
Minnesota	2	1.1%	1	0.6%	0	0.0%	4	2.3%
Missouri	3	2.9%	8	6.3%	0	0.0%	4	2.8%
Montana	2	2.7%	4	4.9%	2	2.5%	2	2.5%
Nebraska	0	0.0%	0	0.0%	0	0.0%	1	7.1%
Nevada	1	3.8%	2	5.6%	0	0.0%	2	4.9%
New Hampshire	11	3.4%	22	7.0%	9	2.9%	10	3.3%
New Mexico	2	3.0%	5	5.5%	2	3.4%	1	1.0%
New York	4	2.1%	2	1.1%	2	1.0%	3	1.5%
North Carolina	5	3.3%	7	5.5%	4	2.6%	2	1.3%
North Dakota	0	0.0%	4	6.6%	0	0.0%	2	3.7%
Ohio	1	1.1%	1	1.0%	3	3.3%	1	1.2%
Oklahoma	1	1.0%	1	1.0%	0	0.0%	3	3.6%
Oregon	0	0.0%	2	3.0%	1	1.7%	0	0.0%
Pennsylvania	1	0.5%	5	2.5%	6	3.0%	4	1.9%
Rhode Island	10	10.2%	6	6.0%	3	2.9%	6	5.7%
South Carolina	5	4.5%	5	3.4%	2	1.7%	9	5.9%
South Dakota	1	1.4%	5	6.8%	0	0.0%	2	3.2%
Tennessee	2	1.9%	12	12.2%	8	7.7%	2	1.8%
Texas	7	4.5%	11	7.5%	11	7.3%	5	3.3%
Utah	2	2.5%	8	10.3%	3	3.9%	3	3.9%
Vermont	0	0.0%	0	0.0%	1	0.7%	1	0.7%
Washington	1	1.0%	1	1.0%	1	0.9%	1	1.0%
West Virginia	3	2.9%	2	2.0%	7	6.6%	2	2.2%
Wisconsin	1	1.1%	2	2.1%	0	0.0%	0	0.0%
Wyoming	0	0.0%	3	5.0%	4	6.3%	3	5.5%

By state

Overview

General elections

Primaries

Alaska

General election defeats

There were 50 seats up for election in Alaska. Overall, 36 incumbents advanced to the general election, including 16 Democrats, 19 Republicans, and one independent. Of that total, two Republican incumbents lost, representing 5.6% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Alaska, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	14	0	0.0%	15	2	13.3%	30	2	6.7%
Senate	2	0	0.0%	4	0	0.0%	6	0	0.0%
Total	16	0	0.0%	19	2	10.5%	36	2	5.6%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Alaska, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	22	2	9.1%	23	1	4.3%	45	3	6.7%
2012	21	6	28.6%	30	2	6.7%	52	9	17.3%
2014	18	0	0.0%	27	1	3.7%	45	1	2.2%
2016	16	0	0.0%	19	2	10.5%	36	2	5.6%

Primary defeats

There were 50 seats up for election in Alaska. Overall, 41 incumbents filed for re-election, including 18 Democrats and 22 Republicans. Of that total, five incumbents lost in primaries—two Democrats and three Republicans—representing 12.2% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Alaska, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	16	2	2	12.5%	18	10	3	16.7%	35	12	5	14.3%
Senate	2	0	0	0.0%	4	0	0	0.0%	6	0	0	0.0%
Total	18	2	2	11.1%	22	10	3	13.6%	41	12	5	12.2%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Alaska, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	22	1	0	0.0%	23	5	0	0.0%	45	6	0	0.0%
2012	21	3	0	0.0%	32	13	2	6.3%	54	16	2	3.7%
2014	18	1	0	0.0%	29	3	2	6.9%	47	4	2	4.3%
2016	18	2	2	11.1%	22	10	3	13.6%	41	12	5	12.2%

Arizona

General election defeats

There were 90 seats up for election in Arizona. Overall, 60 incumbents advanced to the general election, including 23 Democrats and 37 Republicans. Of that total, four incumbents lost—two Democrats and two Republicans—representing 6.7% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arizona, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	13	1	7.7%	26	2	7.7%	39	3	7.7%
Senate	10	1	10.0%	11	0	0.0%	21	1	4.8%
Total	23	2	8.7%	37	2	5.4%	60	4	6.7%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arizona, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	19	6	31.6%	28	0	0.0%	47	6	12.8%
2012	17	0	0.0%	40	4	10.0%	57	4	7.0%
2014	26	1	3.8%	38	1	2.6%	64	2	3.1%
2016	23	2	8.7%	37	2	5.4%	60	4	6.7%

Primary defeats

There were 90 seats up for election in Arizona. Overall, 64 incumbents filed for re-election, including 26 Democrats and 38 Republicans. Of that total, four incumbents lost in primaries—three Democrats and one Republican—representing 6.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arizona, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	16	9	3	18.8%	26	7	0	0.0%	42	16	3	7.1%
Senate	10	2	0	0.0%	12	1	1	8.3%	22	3	1	4.5%
Total	26	11	3	11.5%	38	8	1	2.6%	64	19	4	6.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arizona, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	20	7	1	5.0%	31	19	3	9.7%	51	26	4	7.8%
2012	17	11	0	0.0%	43	13	3	7.0%	60	24	3	5.0%
2014	27	6	1	3.7%	39	22	1	2.6%	66	28	2	3.0%
2016	26	11	3	11.5%	38	8	1	2.6%	64	19	4	6.3%

Arkansas

General election defeats

There were 117 seats up for election in Arkansas. Overall, 98 incumbents advanced to the general election, including 34 Democrats and 64 Republicans. Of that total, six Democratic incumbents lost, representing 6.1% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arkansas, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	29	4	13.8%	54	0	0.0%	83	4	4.8%
Senate	5	2	40.0%	10	0	0.0%	15	2	13.3%
Total	34	6	17.6%	64	0	0.0%	98	6	6.1%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arkansas, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	41	6	14.6%	22	0	0.0%	63	6	9.5%
2012	38	3	7.9%	47	3	6.4%	85	6	7.1%
2014	43	10	23.3%	40	0	0.0%	83	10	12.0%
2016	34	6	17.6%	64	0	0.0%	98	6	6.1%

Primary defeats

There were 117 seats up for election in Arkansas. Overall, 102 incumbents filed for re-election, including 36 Democrats and 66 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 2.0% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arkansas, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	31	2	1	3.2%	56	6	1	1.8%	87	8	2	2.3%
Senate	5	0	0	0.0%	10	2	0	0.0%	15	2	0	0.0%
Total	36	2	1	2.8%	66	8	1	1.5%	102	10	2	2.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arkansas, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	42	3	1	2.4%	22	1	0	0.0%	64	4	1	1.6%
2012	40	6	1	2.5%	48	6	1	2.1%	88	12	2	2.3%
2014	44	1	1	2.3%	43	7	3	7.0%	87	8	4	4.6%
2016	36	2	1	2.8%	66	8	1	1.5%	102	10	2	2.0%

California

General election defeats

There were 100 seats up for election in California. Overall, 74 incumbents advanced to the general election, including 51 Democrats and 23 Republicans. Of that total, five incumbents lost—two Democrats and three Republicans—representing 6.8% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in California, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	43	2	4.7%	20	3	15.0%	63	5	7.9%
Senate	8	0	0.0%	3	0	0.0%	11	0	0.0%
Total	51	2	3.9%	23	3	13.0%	74	5	6.8%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in California, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	44	0	0.0%	18	0	0.0%	62	0	0.0%
2012	36	2	5.6%	20	1	5.0%	56	3	5.4%
2014	45	4	8.9%	22	0	0.0%	67	4	6.0%
2016	51	2	3.9%	23	3	13.0%	74	5	6.8%

Primary defeats

There were 100 seats up for election in California. Overall, 74 incumbents filed for re-election, including 51 Democrats and 23 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in California, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	43	11	0	0.0%	20	8	0	0.0%	63	19	0	0.0%
Senate	8	4	0	0.0%	3	2	0	0.0%	11	6	0	0.0%
Total	51	15	0	0.0%	23	10	0	0.0%	74	25	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in California, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	44	3	0	0.0%	18	3	0	0.0%	62	6	0	0.0%
2012	36	15	0	0.0%	20	7	0	0.0%	56	22	0	0.0%
2014	45	19	0	0.0%	22	4	0	0.0%	67	23	0	0.0%
2016	51	15	0	0.0%	23	10	0	0.0%	74	25	0	0.0%

Colorado

General election defeats

There were 83 seats up for election in Colorado. Overall, 57 incumbents advanced to the general election, including 26 Democrats and 31 Republicans. Of that total, four Republican incumbents lost, representing 7.0% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Colorado, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	23	0	0.0%	25	3	12.0%	48	3	6.3%
Senate	3	0	0.0%	6	1	16.7%	9	1	11.1%
Total	26	0	0.0%	31	4	12.9%	57	4	7.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Colorado, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	37	6	16.2%	26	0	0.0%	64	7	10.9%
2012	29	0	0.0%	22	4	18.2%	51	4	7.8%
2014	36	4	11.1%	23	2	8.7%	59	6	10.2%
2016	26	0	0.0%	31	4	12.9%	57	4	7.0%

Primary defeats

There were 83 seats up for election in Colorado. Overall, 59 incumbents filed for re-election, including 26 Democrats and 33 Republicans. Of that total, two Republican incumbents lost in primaries, representing 3.4% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Colorado, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	23	0	0	0.0%	27	5	2	7.4%	50	5	2	4.0%
Senate	3	0	0	0.0%	6	0	0	0.0%	9	0	0	0.0%
Total	26	0	0	0.0%	33	5	2	6.1%	59	5	2	3.4%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Colorado, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	37	1	0	0.0%	26	0	0	0.0%	64	1	0	0.0%
2012	29	1	0	0.0%	24	3	2	8.3%	53	4	2	3.8%
2014	36	0	0	0.0%	23	2	0	0.0%	59	2	0	0.0%
2016	26	0	0	0.0%	33	5	2	6.1%	59	5	2	3.4%

Connecticut

General election defeats

There were 187 seats up for election in Connecticut. Overall, 162 incumbents advanced to the general election, including 94 Democrats and 68 Republicans. Of that total, 10 incumbents lost—eight Democrats and two Republicans—representing 6.2% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Connecticut, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	74	6	8.1%	54	2	3.7%	128	8	6.3%
Senate	20	2	10.0%	14	0	0.0%	34	2	5.9%
Total	94	8	8.5%	68	2	2.9%	162	10	6.2%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Connecticut, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	123	13	10.6%	44	0	0.0%	167	13	7.8%
2012	100	1	1.0%	59	3	5.1%	159	4	2.5%
2014	103	9	8.7%	58	1	1.7%	161	10	6.2%
2016	94	8	8.5%	68	2	2.9%	162	10	6.2%

Primary defeats

There were 187 seats up for election in Connecticut. Overall, 164 incumbents filed for re-election, including 96 Democrats and 68 Republicans. Of that total, two Democratic incumbents lost in primaries, representing 1.2% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Connecticut, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	76	5	2	2.6%	54	2	0	0.0%	130	7	2	1.5%
Senate	20	3	0	0.0%	14	0	0	0.0%	34	3	0	0.0%
Total	96	8	2	2.1%	68	2	0	0.0%	164	10	2	1.2%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Connecticut, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	124	10	1	0.8%	44	0	0	0.0%	168	10	1	0.6%
2012	104	6	4	3.8%	59	1	0	0.0%	163	7	4	2.5%
2014	105	8	2	1.9%	58	1	0	0.0%	163	9	2	1.2%
2016	96	8	2	2.1%	68	2	0	0.0%	164	10	2	1.2%

Delaware

General election defeats

There were 52 seats up for election in Delaware. Overall, 50 incumbents advanced to the general election, including 31 Democrats and 19 Republicans. Of that total, one Democratic incumbent lost, representing 2.0% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Delaware, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	25	0	0.0%	15	0	0.0%	40	0	0.0%
Senate	6	1	16.7%	4	0	0.0%	10	1	10.0%
Total	31	1	3.2%	19	0	0.0%	50	1	2.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Delaware, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	31	2	6.5%	16	1	6.3%	47	3	6.4%
2012	34	1	2.9%	16	2	12.5%	50	3	6.0%
2014	30	2	6.7%	17	0	0.0%	47	2	4.3%
2016	31	1	3.2%	19	0	0.0%	50	1	2.0%

Primary defeats

There were 52 seats up for election in Delaware. Overall, 50 incumbents filed for re-election, including 31 Democrats and 19 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Delaware, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	25	4	0	0.0%	15	1	0	0.0%	40	5	0	0.0%
Senate	6	1	0	0.0%	4	0	0	0.0%	10	1	0	0.0%
Total	31	5	0	0.0%	19	1	0	0.0%	50	6	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Delaware, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	32	6	1	3.1%	16	1	0	0.0%	48	7	1	2.1%
2012	35	6	1	2.9%	18	5	2	11.1%	53	11	3	5.7%
2014	31	6	1	3.2%	18	3	1	5.6%	49	9	2	4.1%
2016	31	5	0	0.0%	19	1	0	0.0%	50	6	0	0.0%

Florida

General election defeats

There were 160 seats up for election in Florida. Overall, 97 incumbents advanced to the general election, including 25 Democrats and 72 Republicans. Of that total, three incumbents lost—two Democrats and one Republican—representing 3.1% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Florida, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	20	1	5.0%	55	0	0.0%	75	1	1.3%
Senate	5	1	20.0%	17	1	5.9%	22	2	9.1%
Total	25	2	8.0%	72	1	1.4%	97	3	3.1%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Florida, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	40	5	12.5%	55	0	0.0%	95	5	5.3%
2012	29	0	0.0%	77	5	6.5%	106	5	4.7%
2014	42	5	11.9%	79	0	0.0%	121	5	4.1%
2016	25	2	8.0%	72	1	1.4%	97	3	3.1%

Primary defeats

There were 160 seats up for election in Florida. Overall, 98 incumbents filed for re-election, including 26 Democrats and 72 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Florida, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	21	5	0	0.0%	55	6	0	0.0%	76	11	0	0.0%
Senate	5	2	0	0.0%	17	1	0	0.0%	22	3	0	0.0%
Total	26	7	0	0.0%	72	7	0	0.0%	98	14	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Florida, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	40	6	0	0.0%	57	12	1	1.8%	97	18	1	1.0%
2012	31	7	2	6.5%	79	24	1	1.3%	110	31	3	2.7%
2014	43	8	1	2.3%	79	13	0	0.0%	122	21	1	0.8%
2016	26	7	0	0.0%	72	7	0	0.0%	98	14	0	0.0%

Georgia

General election defeats

There were 236 seats up for election in Georgia. Overall, 209 incumbents advanced to the general election, including 68 Democrats and 141 Republicans. Of that total, four incumbents lost—one Democrat and three Republicans—representing 1.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Georgia, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	51	1	2.0%	105	2	1.9%	156	3	1.9%
Senate	17	0	0.0%	36	1	2.8%	53	1	1.9%
Total	68	1	1.5%	141	3	2.1%	209	4	1.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Georgia, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	84	2	2.4%	108	1	0.9%	193	3	1.6%
2012	67	3	4.5%	128	0	0.0%	196	3	1.5%
2014	72	0	0.0%	139	0	0.0%	212	0	0.0%
2016	68	1	1.5%	141	3	2.1%	209	4	1.9%

Primary defeats

There were 236 seats up for election in Georgia. Overall, 214 incumbents filed for re-election, including 71 Democrats and 143 Republicans. Of that total, five incumbents lost in primaries—three Democrats and two Republicans—representing 2.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Georgia, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	54	18	3	5.6%	107	21	2	1.9%	161	39	5	3.1%
Senate	17	1	0	0.0%	36	9	0	0.0%	53	10	0	0.0%
Total	71	19	3	4.2%	143	30	2	1.4%	214	49	5	2.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Georgia, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	86	19	2	2.3%	111	22	3	2.7%	198	41	5	2.5%
2012	73	25	6	8.2%	136	23	6	4.4%	210	48	12	5.7%
2014	74	17	2	2.7%	144	30	5	3.5%	219	47	7	3.2%
2016	71	19	3	4.2%	143	30	2	1.4%	214	49	5	2.3%

Hawaii

General election defeats

There were 64 seats up for election in Hawaii. Overall, 60 incumbents advanced to the general election, including 52 Democrats and eight Republicans. Of that total, two Republican incumbents lost, representing 3.3% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Hawaii, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	41	0	0.0%	7	1	14.3%	48	1	2.1%
Senate	11	0	0.0%	1	1	100.0%	12	1	8.3%
Total	52	0	0.0%	8	2	25.0%	60	2	3.3%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Hawaii, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	51	1	2.0%	6	0	0.0%	57	1	1.8%
2012	60	1	1.7%	6	2	33.3%	66	3	4.5%
2014	49	0	0.0%	6	0	0.0%	55	0	0.0%
2016	52	0	0.0%	8	2	25.0%	60	2	3.3%

Primary defeats

There were 64 seats up for election in Hawaii. Overall, 61 incumbents filed for re-election, including 53 Democrats and eight Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.6% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Hawaii, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	42	18	1	2.4%	7	2	0	0.0%	49	20	1	2.0%
Senate	11	4	0	0.0%	1	0	0	0.0%	12	4	0	0.0%
Total	53	22	1	1.9%	8	2	0	0.0%	61	24	1	1.6%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Hawaii, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	52	24	1	1.9%	6	0	0	0.0%	58	24	1	1.7%
2012	64	24	4	6.3%	7	2	1	14.3%	71	26	5	7.0%
2014	52	19	3	5.8%	6	1	0	0.0%	58	20	3	5.2%
2016	53	22	1	1.9%	8	2	0	0.0%	61	24	1	1.6%

Idaho

General election defeats

There were 105 seats up for election in Idaho. Overall, 89 incumbents advanced to the general election, including 17 Democrats and 72 Republicans. Of that total, two Democratic incumbents lost, representing 2.2% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Idaho, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	11	1	9.1%	46	0	0.0%	57	1	1.8%
Senate	6	1	16.7%	26	0	0.0%	32	1	3.1%
Total	17	2	11.8%	72	0	0.0%	89	2	2.2%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Idaho, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	19	2	10.5%	71	0	0.0%	90	2	2.2%
2012	11	0	0.0%	55	2	3.6%	66	2	3.0%
2014	15	0	0.0%	73	2	2.7%	88	2	2.3%
2016	17	2	11.8%	72	0	0.0%	89	2	2.2%

Primary defeats

There were 105 seats up for election in Idaho. Overall, 96 incumbents filed for re-election, including 17 Democrats and 79 Republicans. Of that total, seven Republican incumbents lost in primaries, representing 7.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Idaho, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	11	1	0	0.0%	52	25	6	11.5%	63	26	6	9.5%
Senate	6	0	0	0.0%	27	5	1	3.7%	33	5	1	3.0%
Total	17	1	0	0.0%	79	30	7	8.9%	96	31	7	7.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Idaho, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	19	1	0	0.0%	77	25	6	7.8%	96	26	6	6.3%
2012	11	1	0	0.0%	59	33	3	5.1%	70	34	3	4.3%
2014	15	1	0	0.0%	79	29	6	7.6%	94	30	6	6.4%
2016	17	1	0	0.0%	79	30	7	8.9%	96	31	7	7.3%

Illinois

General election defeats

There were 158 seats up for election in Illinois. Overall, 143 incumbents advanced to the general election, including 90 Democrats and 53 Republicans. Of that total, six incumbents lost—five Democrats and one Republican—representing 4.2% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Illinois, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	65	4	6.2%	42	1	2.4%	107	5	4.7%
Senate	25	1	4.0%	11	0	0.0%	36	1	2.8%
Total	90	5	5.6%	53	1	1.9%	143	6	4.2%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Illinois, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	75	7	9.3%	50	0	0.0%	125	7	5.6%
2012	81	0	0.0%	58	5	8.6%	139	5	3.6%
2014	80	1	1.3%	43	0	0.0%	123	1	0.8%
2016	90	5	5.6%	53	1	1.9%	143	6	4.2%

Primary defeats

There were 158 seats up for election in Illinois. Overall, 144 incumbents filed for re-election, including 92 Democrats and 52 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 0.7% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Illinois, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	67	9	1	1.5%	42	4	0	0.0%	109	13	1	0.9%
Senate	25	2	0	0.0%	10	2	0	0.0%	35	4	0	0.0%
Total	92	11	1	1.1%	52	6	0	0.0%	144	17	1	0.7%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Illinois, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	76	14	0	0.0%	51	7	1	2.0%	127	21	1	0.8%
2012	82	21	1	1.2%	63	12	5	7.9%	145	33	6	4.1%
2014	82	9	2	2.4%	43	5	1	2.3%	125	14	3	2.4%
2016	92	11	1	1.1%	52	6	0	0.0%	144	17	1	0.7%

Indiana

General election defeats

There were 125 seats up for election in Indiana. Overall, 105 incumbents advanced to the general election, including 29 Democrats and 76 Republicans. Of that total, one Republican incumbent lost, representing 1.0% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Indiana, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	25	0	0.0%	64	1	1.6%	89	1	1.1%
Senate	4	0	0.0%	12	0	0.0%	16	0	0.0%
Total	29	0	0.0%	76	1	1.3%	105	1	1.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Indiana, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	56	10	17.9%	55	0	0.0%	111	10	9.0%
2012	34	3	8.8%	68	2	2.9%	102	5	4.9%
2014	36	5	13.9%	79	1	1.3%	115	6	5.2%
2016	29	0	0.0%	76	1	1.3%	105	1	1.0%

Primary defeats

There were 125 seats up for election in Indiana. Overall, 108 incumbents filed for re-election, including 30 Democrats and 78 Republicans. Of that total, two Republican incumbents lost in primaries, representing 1.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Indiana, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	26	1	0	0.0%	65	11	1	1.5%	91	12	1	1.1%
Senate	4	1	0	0.0%	13	4	1	7.7%	17	5	1	5.9%
Total	30	2	0	0.0%	78	15	2	2.6%	108	17	2	1.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Indiana, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	56	6	0	0.0%	57	15	2	3.5%	113	21	2	1.8%
2012	35	5	0	0.0%	68	12	0	0.0%	103	17	0	0.0%
2014	36	0	0	0.0%	81	11	3	3.7%	117	11	3	2.6%
2016	30	2	0	0.0%	78	15	2	2.6%	108	17	2	1.9%

Iowa

General election defeats

There were 125 seats up for election in Iowa. Overall, 110 incumbents advanced to the general election, including 49 Democrats and 61 Republicans. Of that total, seven Democratic incumbents lost, representing 6.4% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Iowa, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	38	1	2.6%	48	0	0.0%	86	1	1.2%
Senate	11	6	54.5%	13	0	0.0%	24	6	25.0%
Total	49	7	14.3%	61	0	0.0%	110	7	6.4%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Iowa, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	63	18	28.6%	42	0	0.0%	105	18	17.1%
2012	45	1	2.2%	51	7	13.7%	96	8	8.3%
2014	55	5	9.1%	54	0	0.0%	109	5	4.6%
2016	49	7	14.3%	61	0	0.0%	110	7	6.4%

Primary defeats

There were 125 seats up for election in Iowa. Overall, 112 incumbents filed for re-election, including 50 Democrats and 62 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 0.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Iowa, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	39	4	1	2.6%	49	5	0	0.0%	88	9	1	1.1%
Senate	11	0	0	0.0%	13	0	0	0.0%	24	0	0	0.0%
Total	50	4	1	2.0%	62	5	0	0.0%	112	9	1	0.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Iowa, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	65	5	1	1.5%	43	3	1	2.3%	108	8	2	1.9%
2012	45	0	0	0.0%	55	16	3	5.5%	100	16	3	3.0%
2014	55	3	0	0.0%	55	5	0	0.0%	110	8	0	0.0%
2016	50	4	1	2.0%	62	5	0	0.0%	112	9	1	0.9%

Kansas

General election defeats

There were 165 seats up for election in Kansas. Overall, 117 incumbents advanced to the general election, including 33 Democrats and 84 Republicans. Of that total, 11 Republican incumbents lost, representing 9.4% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kansas, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	25	0	0.0%	66	11	16.7%	91	11	12.1%
Senate	8	0	0.0%	18	0	0.0%	26	0	0.0%
Total	33	0	0.0%	84	11	13.1%	117	11	9.4%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kansas, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	44	13	29.5%	66	0	0.0%	110	13	11.8%
2012	36	8	22.2%	71	6	8.5%	107	14	13.1%
2014	29	3	10.3%	80	0	0.0%	109	3	2.8%
2016	33	0	0.0%	84	11	13.1%	117	11	9.4%

Primary defeats

There were 165 seats up for election in Kansas. Overall, 132 incumbents filed for re-election, including 34 Democrats and 98 Republicans. Of that total, 15 incumbents lost in primaries—one Democrat and 14 Republicans—representing 11.4% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kansas, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	26	4	1	3.8%	74	24	8	10.8%	100	28	9	9.0%
Senate	8	0	0	0.0%	24	11	6	25.0%	32	11	6	18.8%
Total	34	4	1	2.9%	98	35	14	14.3%	132	39	15	11.4%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kansas, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	45	3	1	2.2%	70	20	4	5.7%	115	23	5	4.3%
2012	37	6	1	2.7%	90	48	19	21.1%	127	54	20	15.7%
2014	29	0	0	0.0%	83	21	3	3.6%	112	21	3	2.7%
2016	34	4	1	2.9%	98	35	14	14.3%	132	39	15	11.4%

Kentucky

General election defeats

There were 119 seats up for election in Kentucky. Overall, 107 incumbents advanced to the general election, including 56 Democrats and 51 Republicans. Of that total, 18 incumbents lost—17 Democrats and one Republican—representing 16.8% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kentucky, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	48	17	35.4%	42	1	2.4%	90	18	20.0%
Senate	8	0	0.0%	9	0	0.0%	17	0	0.0%
Total	56	17	30.4%	51	1	2.0%	107	18	16.8%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kentucky, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	67	7	10.4%	42	1	2.4%	110	8	7.3%
2012	63	3	4.8%	41	1	2.4%	104	4	3.8%
2014	54	3	5.6%	52	1	1.9%	106	4	3.8%
2016	56	17	30.4%	51	1	2.0%	107	18	16.8%

Primary defeats

There were 119 seats up for election in Kentucky. Overall, 109 incumbents filed for re-election, including 57 Democrats and 52 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 1.8% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kentucky, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	49	5	1	2.0%	43	7	1	2.3%	92	12	2	2.2%
Senate	8	2	0	0.0%	9	2	0	0.0%	17	4	0	0.0%
Total	57	7	1	1.8%	52	9	1	1.9%	109	16	2	1.8%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kentucky, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	68	11	1	1.5%	43	10	1	2.3%	112	21	2	1.8%
2012	64	11	1	1.6%	42	11	0	0.0%	106	22	1	0.9%
2014	55	6	1	1.8%	53	9	1	1.9%	108	15	2	1.9%
2016	57	7	1	1.8%	52	9	1	1.9%	109	16	2	1.8%

Maine

General election defeats

There were 186 seats up for election in Maine. Overall, 147 incumbents advanced to the general election, including 69 Democrats and 78 Republicans. Of that total, 13 incumbents lost—eight Democrats and five Republicans—representing 8.8% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Maine, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	58	6	10.3%	63	5	7.9%	121	11	9.1%
Senate	11	2	18.2%	15	0	0.0%	26	2	7.7%
Total	69	8	11.6%	78	5	6.4%	147	13	8.8%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Maine, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	90	19	21.1%	49	1	2.0%	139	20	14.4%
2012	53	1	1.9%	66	16	24.2%	121	17	14.0%
2014	81	11	13.6%	42	2	4.8%	127	13	10.2%
2016	69	8	11.6%	78	5	6.4%	147	13	8.8%

Primary defeats

There were 186 seats up for election in Maine. Overall, 149 incumbents filed for re-election, including 69 Democrats and 80 Republicans. Of that total, one Republican incumbent lost in a primary, representing 0.7% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Maine, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	58	1	0	0.0%	64	1	0	0.0%	122	2	0	0.0%
Senate	11	1	0	0.0%	16	1	1	6.3%	27	2	1	3.7%
Total	69	2	0	0.0%	80	2	1	1.3%	149	4	1	0.7%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Maine, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	94	3	1	1.1%	49	1	0	0.0%	143	4	1	0.7%
2012	54	4	0	0.0%	67	1	0	0.0%	123	5	0	0.0%
2014	85	2	0	0.0%	48	1	0	0.0%	137	3	0	0.0%
2016	69	2	0	0.0%	80	2	1	1.3%	149	4	1	0.7%

Massachusetts

General election defeats

There were 200 seats up for election in Massachusetts. Overall, 185 incumbents advanced to the general election, including 145 Democrats and 40 Republicans. No incumbents who advanced to the general election lost.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Massachusetts, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	114	0	0.0%	34	0	0.0%	148	0	0.0%
Senate	31	0	0.0%	6	0	0.0%	37	0	0.0%
Total	145	0	0.0%	40	0	0.0%	185	0	0.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Massachusetts, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	150	10	6.7%	15	0	0.0%	165	10	6.1%
2012	149	0	0.0%	35	2	5.7%	184	2	1.1%
2014	148	3	2.0%	30	0	0.0%	178	3	1.7%
2016	145	0	0.0%	40	0	0.0%	185	0	0.0%

Primary defeats

There were 200 seats up for election in Massachusetts. Overall, 187 incumbents filed for re-election, including 147 Democrats and 40 Republicans. Of that total, two Democratic incumbents lost in primaries, representing 1.1% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Massachusetts, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	116	16	2	1.7%	34	0	0	0.0%	150	16	2	1.3%
Senate	31	3	0	0.0%	6	1	0	0.0%	37	4	0	0.0%
Total	147	19	2	1.4%	40	1	0	0.0%	187	20	2	1.1%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Massachusetts, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	151	14	1	0.7%	15	0	0	0.0%	166	14	1	0.6%
2012	154	18	4	2.6%	36	1	0	0.0%	190	19	4	2.1%
2014	148	16	1	0.7%	30	1	0	0.0%	178	17	1	0.6%
2016	147	19	2	1.4%	40	1	0	0.0%	187	20	2	1.1%

Michigan

General election defeats

There were 110 seats up for election in Michigan. Overall, 68 incumbents advanced to the general election, including 32 Democrats and 36 Republicans. Of that total, one Democratic incumbent lost, representing 1.5% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Michigan, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	32	1	3.1%	36	0	0.0%	68	1	1.5%
Senate	Did not hold elections.
Total	32	1	3.1%	36	0	0.0%	68	1	1.5%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Michigan, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	40	9	22.5%	28	0	0.0%	68	9	13.2%
2012	32	0	0.0%	55	5	9.1%	87	5	5.7%
2014	40	2	5.0%	56	0	0.0%	96	2	2.1%
2016	32	1	3.1%	36	0	0.0%	68	1	1.5%

Primary defeats

There were 110 seats up for election in Michigan. Overall, 68 incumbents filed for re-election, including 32 Democrats and 36 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Michigan, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	32	14	0	0.0%	36	9	0	0.0%	68	23	0	0.0%
Senate	Did not hold elections.
Total	32	14	0	0.0%	36	9	0	0.0%	68	23	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Michigan, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	40	10	0	0.0%	28	7	0	0.0%	68	17	0	0.0%
2012	36	19	4	11.1%	56	18	1	1.8%	92	37	5	5.4%
2014	40	9	0	0.0%	57	19	1	1.8%	97	28	1	1.0%
2016	32	14	0	0.0%	36	9	0	0.0%	68	23	0	0.0%

Minnesota

General election defeats

There were 201 seats up for election in Minnesota. Overall, 169 incumbents advanced to the general election, including 80 Democrats and 89 Republicans. Of that total, 11 incumbents lost—nine Democrats and two Republicans—representing 6.5% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Minnesota, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	50	4	8.0%	66	1	1.5%	116	5	4.3%
Senate	30	5	16.7%	23	1	4.3%	53	6	11.3%
Total	80	9	11.3%	89	2	2.2%	169	11	6.5%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Minnesota, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	120	34	28.3%	55	0	0.0%	175	34	19.4%
2012	71	0	0.0%	81	16	19.8%	152	16	10.5%
2014	68	11	16.2%	51	0	0.0%	119	11	9.2%
2016	80	9	11.3%	89	2	2.2%	169	11	6.5%

Primary defeats

There were 201 seats up for election in Minnesota. Overall, 173 incumbents filed for re-election, including 82 Democrats and 91 Republicans. Of that total, four incumbents lost in primaries—two Democrats and two Republicans—representing 2.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Minnesota, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	52	4	2	3.8%	67	3	1	1.5%	119	7	3	2.5%
Senate	30	3	0	0.0%	24	1	1	4.2%	54	4	1	1.9%
Total	82	7	2	2.4%	91	4	2	2.2%	173	11	4	2.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Minnesota, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	121	5	1	0.8%	56	3	1	1.8%	177	8	2	1.1%
2012	72	7	0	0.0%	82	4	1	1.2%	154	11	1	0.6%
2014	68	4	0	0.0%	51	1	0	0.0%	119	5	0	0.0%
2016	82	7	2	2.4%	91	4	2	2.2%	173	11	4	2.3%

Missouri

General election defeats

There were 180 seats up for election in Missouri. Overall, 137 incumbents advanced to the general election, including 32 Democrats, 104 Republicans, and one independent. Of that total, one independent incumbent lost, representing 0.7% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Missouri, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	27	0	0.0%	97	0	0.0%	125	1^[3]	0.8%
Senate	5	0	0.0%	7	0	0.0%	12	0	0.0%
Total	32	0	0.0%	104	0	0.0%	137	1^[4]	0.7%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Missouri, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	53	12	22.6%	49	0	0.0%	102	12	11.8%
2012	36	2	5.6%	82	4	4.9%	118	6	5.1%
2014	48	5	10.4%	100	0	0.0%	148	5	3.4%
2016	32	0	0.0%	104	0	0.0%	137	1^[5]	0.7%

Primary defeats

There were 180 seats up for election in Missouri. Overall, 142 incumbents filed for re-election, including 35 Democrats and 106 Republicans. Of that total, four incumbents lost in primaries—two Democrats and two Republicans—representing 2.8% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Missouri, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	30	6	2	6.7%	99	13	2	2.0%	130	19	4	3.1%
Senate	5	1	0	0.0%	7	1	0	0.0%	12	2	0	0.0%
Total	35	7	2	5.7%	106	14	2	1.9%	142	21	4	2.8%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Missouri, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	55	8	2	3.6%	50	7	1	2.0%	105	15	3	2.9%
2012	43	19	7	16.3%	83	16	1	1.2%	126	35	8	6.3%
2014	47	8	0	0.0%	100	14	0	0.0%	147	22	0	0.0%
2016	35	7	2	5.7%	106	14	2	1.9%	142	21	4	2.8%

Montana

General election defeats

There were 125 seats up for election in Montana. Overall, 77 incumbents advanced to the general election, including 35 Democrats and 42 Republicans. Of that total, five incumbents lost—two Democrats and three Republicans—representing 6.5% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Montana, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	30	2	6.7%	37	3	8.1%	67	5	7.5%
Senate	5	0	0.0%	5	0	0.0%	10	0	0.0%
Total	35	2	5.7%	42	3	7.1%	77	5	6.5%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Montana, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	33	9	27.3%	40	1	2.5%	73	10	13.7%
2012	26	1	3.8%	53	7	13.2%	79	8	10.1%
2014	30	2	6.7%	46	4	8.7%	76	6	7.9%
2016	35	2	5.7%	42	3	7.1%	77	5	6.5%

Primary defeats

There were 125 seats up for election in Montana. Overall, 80 incumbents filed for re-election, including 36 Democrats and 44 Republicans. Of that total, two Republican incumbents lost in primaries, representing 2.5% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Montana, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	30	1	0	0.0%	39	12	2	5.1%	69	13	2	2.9%
Senate	6	0	0	0.0%	5	1	0	0.0%	11	1	0	0.0%
Total	36	1	0	0.0%	44	13	2	4.5%	80	14	2	2.5%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Montana, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	34	3	1	2.9%	41	8	1	2.4%	75	11	2	2.7%
2012	26	3	1	3.8%	56	14	3	5.4%	82	17	4	4.9%
2014	32	3	0	0.0%	48	15	2	4.2%	80	18	2	2.5%
2016	36	1	0	0.0%	44	13	2	4.5%	80	14	2	2.5%

Nebraska

General election defeats

There were 25 seats up for election in Nebraska. Overall, 13 incumbents advanced to the general election, including four Democrats, eight Republicans, and one independent. Of that total, five Republican incumbents lost, representing 38.5% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nebraska, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	N/A
Senate	4	0	0.0%	8	5	62.5%	13	5	38.5%
Total	4	0	0.0%	8	5	62.5%	13	5	38.5%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nebraska, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	10	1	10.0%	10	0	0.0%	21	2	9.5%
2012	6	1	16.7%	10	0	0.0%	16	1	6.3%
2014	2	0	0.0%	5	0	0.0%	7	0	0.0%
2016	4	0	0.0%	8	5	62.5%	13	5	38.5%

Primary defeats

There were 25 seats up for election in Nebraska. Overall, 14 incumbents filed for re-election, including four Democrats, nine Republicans, and one independent. Of that total, one Republican incumbent lost in a primary, representing 7.1% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nebraska, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	N/A
Senate	4	2	0	0.0%	9	1	1	11.1%	14	4	1	7.1%
Total	4	2	0	0.0%	9	1	1	11.1%	14	4	1	7.1%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nebraska, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	10	4	0	0.0%	10	1	0	0.0%	21	6	0	0.0%
2012	6	2	0	0.0%	10	2	0	0.0%	16	4	0	0.0%
2014	2	0	0	0.0%	5	1	0	0.0%	7	1	0	0.0%
2016	4	2	0	0.0%	9	1	1	11.1%	14	4	1	7.1%

Nevada

General election defeats

There were 52 seats up for election in Nevada. Overall, 39 incumbents advanced to the general election, including 21 Democrats, 17 Republicans, and one Libertarian. Of that total, seven incumbents lost—six Republicans and one Libertarian—representing 17.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nevada, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	15	0	0.0%	15	6	40.0%	31	7^[6]	22.6%
Senate	6	0	0.0%	2	0	0.0%	8	0	0.0%
Total	21	0	0.0%	17	6	35.3%	39	7^[7]	17.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nevada, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	17	2	11.8%	8	0	0.0%	25	2	8.0%
2012	23	1	4.3%	11	0	0.0%	34	1	2.9%
2014	26	7	26.9%	17	0	0.0%	43	7	16.3%
2016	21	0	0.0%	17	6	35.3%	39	7^[8]	17.9%

Primary defeats

There were 52 seats up for election in Nevada. Overall, 41 incumbents filed for re-election, including 21 Democrats and 19 Republicans. Of that total, two Republican incumbents lost in primaries, representing 4.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nevada, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	15	3	0	0.0%	17	11	2	11.8%	33	14	2	6.1%
Senate	6	3	0	0.0%	2	0	0	0.0%	8	3	0	0.0%
Total	21	6	0	0.0%	19	11	2	10.5%	41	17	2	4.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nevada, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	17	1	0	0.0%	9	4	1	11.1%	26	5	1	3.8%
2012	24	10	1	4.2%	12	2	1	8.3%	36	12	2	5.6%
2014	26	5	0	0.0%	17	8	0	0.0%	43	13	0	0.0%
2016	21	6	0	0.0%	19	11	2	10.5%	41	17	2	4.9%

New Hampshire

General election defeats

There were 424 seats up for election in New Hampshire. Overall, 297 incumbents advanced to the general election, including 128 Democrats and 169 Republicans. Of that total, 23 incumbents lost—11 Democrats and 12 Republicans—representing 7.7% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Hampshire, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	120	10	8.3%	161	12	7.5%	281	22	7.8%
Senate	8	1	12.5%	8	0	0.0%	16	1	6.3%
Total	128	11	8.6%	169	12	7.1%	297	23	7.7%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Hampshire, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	174	88	50.6%	137	0	0.0%	311	88	28.3%
2012	82	4	4.9%	211	74	35.1%	293	78	26.6%
2014	169	43	25.4%	135	3	2.2%	304	46	15.1%
2016	128	11	8.6%	169	12	7.1%	297	23	7.7%

Primary defeats

There were 424 seats up for election in New Hampshire. Overall, 307 incumbents filed for re-election, including 128 Democrats and 179 Republicans. Of that total, 10 Republican incumbents lost in primaries, representing 3.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Hampshire, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	120	25	0	0.0%	171	99	10	5.8%	291	124	10	3.4%
Senate	8	0	0	0.0%	8	1	0	0.0%	16	1	0	0.0%
Total	128	25	0	0.0%	179	*100*	10	5.6%	307	*125*	10	3.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Hampshire, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	178	45	3	1.7%	144	79	8	5.6%	322	124	11	3.4%
2012	85	14	3	3.5%	230	131	19	8.3%	315	145	22	7.0%
2014	170	24	1	0.6%	143	80	8	5.6%	313	104	9	2.9%
2016	128	25	0	0.0%	179	100	10	5.6%	307	125	10	3.3%

New Mexico

General election defeats

There were 112 seats up for election in New Mexico. Overall, 103 incumbents advanced to the general election, including 52 Democrats and 51 Republicans. Of that total, eight incumbents lost—one Democrat and seven Republicans—representing 7.8% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Mexico, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	28	0	0.0%	34	4	11.8%	62	4	6.5%
Senate	24	1	4.2%	17	3	17.6%	41	4	9.8%
Total	52	1	1.9%	51	7	13.7%	103	8	7.8%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Mexico, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	43	7	16.3%	22	0	0.0%	65	7	10.8%
2012	45	4	8.9%	39	3	7.7%	85	8	9.4%
2014	31	5	16.1%	27	1	3.7%	58	6	10.3%
2016	52	1	1.9%	51	7	13.7%	103	8	7.8%

Primary defeats

There were 112 seats up for election in New Mexico. Overall, 102 incumbents filed for re-election, including 52 Democrats and 50 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.0% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Mexico, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	28	5	1	3.6%	34	0	0	0.0%	62	5	1	1.6%
Senate	24	4	0	0.0%	16	0	0	0.0%	40	4	0	0.0%
Total	52	9	1	1.9%	50	0	0	0.0%	102	9	1	1.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Mexico, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	44	10	1	2.3%	23	4	1	4.3%	67	14	2	3.0%
2012	50	19	4	8.0%	40	5	1	2.5%	91	24	5	5.5%
2014	31	5	1	3.2%	28	2	1	3.6%	59	7	2	3.4%
2016	52	9	1	1.9%	50	0	0	0.0%	102	9	1	1.0%

New York

General election defeats

There were 213 seats up for election in New York. Overall, 190 incumbents advanced to the general election, including 126 Democrats and 64 Republicans. Of that total, two^[9] incumbents lost—one Democrat and one Republican—representing 1.1% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New York, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	97	1	1.0%	36	0	0.0%	133	1	0.8%
Senate	29	0	0.0%	28	1	3.6%	57	1	1.8%
Total	126	1	0.8%	64	1	1.6%	190	2	1.1%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New York, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	124	10	8.1%	59	1	1.7%	183	11	6.0%
2012	116	0	0.0%	71	4	5.6%	187	4	2.1%
2014	125	4	3.2%	65	0	0.0%	190	4	2.1%
2016	126	1	0.8%	64	1	1.6%	190	2	1.1%

Primary defeats

There were 213 seats up for election in New York. Overall, 194 incumbents filed for re-election, including 129 Democrats and 65 Republicans. Of that total, three Democratic incumbents lost in primaries, representing 1.5% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New York, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	100	21	3	3.0%	37	5	0	0.0%	137	26	3	2.2%
Senate	29	7	0	0.0%	28	0	0	0.0%	57	7	0	0.0%
Total	129	28	3	2.3%	65	5	0	0.0%	194	33	3	1.5%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New York, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	128	35	4	3.1%	59	2	0	0.0%	187	37	4	2.1%
2012	118	24	2	1.7%	71	9	0	0.0%	189	33	2	1.1%
2014	126	22	1	0.8%	66	5	1	1.5%	192	27	2	1.0%
2016	129	28	3	2.3%	65	5	0	0.0%	194	33	3	1.5%

North Carolina

General election defeats

There were 170 seats up for election in North Carolina. Overall, 152 incumbents advanced to the general election, including 57 Democrats and 95 Republicans. Of that total, six incumbents lost—three Democrats and three Republicans—representing 3.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Carolina, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	41	2	4.9%	65	3	4.6%	106	5	4.7%
Senate	16	1	6.3%	30	0	0.0%	46	1	2.2%
Total	57	3	5.3%	95	3	3.2%	152	6	3.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Carolina, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	83	20	24.1%	63	0	0.0%	146	20	13.7%
2012	47	5	10.6%	70	1	1.4%	117	6	5.1%
2014	52	1	1.9%	102	4	3.9%	154	5	3.2%
2016	57	3	5.3%	95	3	3.2%	152	6	3.9%

Primary defeats

There were 170 seats up for election in North Carolina. Overall, 150 incumbents filed for re-election, including 57 Democrats and 93 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 1.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Carolina, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	42	9	1	2.4%	65	15	1	1.5%	107	24	2	1.9%
Senate	15	4	0	0.0%	28	3	0	0.0%	43	7	0	0.0%
Total	57	13	1	1.8%	93	18	1	1.1%	150	31	2	1.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Carolina, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	88	24	4	4.5%	64	15	1	1.6%	152	39	5	3.3%
2012	50	15	2	4.0%	77	22	5	6.5%	127	37	7	5.5%
2014	54	9	2	3.7%	102	20	2	2.0%	156	29	4	2.6%
2016	57	13	1	1.8%	93	18	1	1.1%	150	31	2	1.3%

North Dakota

General election defeats

There were 69 seats up for election in North Dakota. Overall, 52 incumbents advanced to the general election, including 21 Democrats and 31 Republicans. Of that total, 17 incumbents lost—15 Democrats and two Republicans—representing 32.7% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Dakota, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	12	9	75.0%	20	1	5.0%	32	10	31.3%
Senate	9	6	66.7%	11	1	9.1%	20	7	35.0%
Total	21	15	71.4%	31	2	6.5%	52	17	32.7%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Dakota, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	24	12	50.0%	33	0	0.0%	57	12	21.1%
2012	18	4	22.2%	39	2	5.1%	57	6	10.5%
2014	10	1	10.0%	49	2	4.1%	59	3	5.1%
2016	21	15	71.4%	31	2	6.5%	52	17	32.7%

Primary defeats

There were 69 seats up for election in North Dakota. Overall, 54 incumbents filed for re-election, including 21 Democrats and 33 Republicans. Of that total, two Republican incumbents lost in primaries, representing 3.7% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Dakota, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	12	0	0	0.0%	22	6	2	9.1%	34	6	2	5.9%
Senate	9	0	0	0.0%	11	1	0	0.0%	20	1	0	0.0%
Total	21	0	0	0.0%	33	7	2	6.1%	54	7	2	3.7%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Dakota, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	24	2	0	0.0%	33	0	0	0.0%	57	2	0	0.0%
2012	18	0	0	0.0%	43	10	4	9.3%	61	10	4	6.6%
2014	10	0	0	0.0%	49	4	0	0.0%	59	4	0	0.0%
2016	21	0	0	0.0%	33	7	2	6.1%	54	7	2	3.7%

Ohio

General election defeats

There were 115 seats up for election in Ohio. Overall, 87 incumbents advanced to the general election, including 28 Democrats and 59 Republicans. Of that total, one Democratic incumbent lost, representing 1.1% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Ohio, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	27	0	0.0%	50	0	0.0%	77	0	0.0%
Senate	1	1	100.0%	9	0	0.0%	10	1	10.0%
Total	28	1	3.6%	59	0	0.0%	87	1	1.1%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Ohio, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	46	13	28.3%	40	0	0.0%	86	13	15.1%
2012	35	0	0.0%	65	2	3.1%	100	2	2.0%
2014	30	3	10.0%	56	0	0.0%	86	3	3.5%
2016	28	1	3.6%	59	0	0.0%	87	1	1.1%

Primary defeats

There were 115 seats up for election in Ohio. Overall, 86 incumbents filed for re-election, including 28 Democrats and 58 Republicans. Of that total, one Republican incumbent lost in a primary, representing 1.2% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Ohio, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	27	4	0	0.0%	49	6	1	2.0%	76	10	1	1.3%
Senate	1	0	0	0.0%	9	4	0	0.0%	10	4	0	0.0%
Total	28	4	0	0.0%	58	10	1	1.7%	86	14	1	1.2%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Ohio, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	47	6	1	2.1%	40	8	0	0.0%	87	14	1	1.1%
2012	36	6	0	0.0%	62	8	1	1.6%	98	14	1	1.0%
2014	31	4	1	3.2%	59	19	2	3.4%	90	23	3	3.3%
2016	28	4	0	0.0%	58	10	1	1.7%	86	14	1	1.2%

Oklahoma

General election defeats

There were 125 seats up for election in Oklahoma. Overall, 81 incumbents advanced to the general election, including 20 Democrats and 61 Republicans. No incumbents who advanced to the general election lost.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oklahoma, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	19	0	0.0%	50	0	0.0%	69	0	0.0%
Senate	1	0	0.0%	11	0	0.0%	12	0	0.0%
Total	20	0	0.0%	61	0	0.0%	81	0	0.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oklahoma, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	40	6	15.0%	62	0	0.0%	102	6	5.9%
2012	30	0	0.0%	71	0	0.0%	101	0	0.0%
2014	25	0	0.0%	70	1	1.4%	95	1	1.1%
2016	20	0	0.0%	61	0	0.0%	81	0	0.0%

Primary defeats

There were 125 seats up for election in Oklahoma. Overall, 84 incumbents filed for re-election, including 20 Democrats and 64 Republicans. Of that total, three Republican incumbents lost in primaries, representing 3.6% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oklahoma, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	19	3	0	0.0%	52	16	2	3.8%	71	19	2	2.8%
Senate	1	1	0	0.0%	12	8	1	8.3%	13	9	1	7.7%
Total	20	4	0	0.0%	64	24	3	4.7%	84	28	3	3.6%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oklahoma, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	41	5	1	2.4%	62	7	0	0.0%	103	12	1	1.0%
2012	30	2	0	0.0%	72	17	1	1.4%	102	19	1	1.0%
2014	25	1	0	0.0%	70	12	0	0.0%	95	13	0	0.0%
2016	20	4	0	0.0%	64	24	3	4.7%	84	28	3	3.6%

Oregon

General election defeats

There were 75 seats up for election in Oregon. Overall, 58 incumbents advanced to the general election, including 30 Democrats and 28 Republicans. No incumbents who advanced to the general election lost.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oregon, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	25	0	0.0%	21	0	0.0%	46	0	0.0%
Senate	5	0	0.0%	7	0	0.0%	12	0	0.0%
Total	30	0	0.0%	28	0	0.0%	58	0	0.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oregon, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	43	4	9.3%	25	0	0.0%	68	4	5.9%
2012	30	0	0.0%	34	4	11.8%	64	4	6.3%
2014	38	0	0.0%	21	2	9.5%	59	2	3.4%
2016	30	0	0.0%	28	0	0.0%	58	0	0.0%

Primary defeats

There were 75 seats up for election in Oregon. Overall, 58 incumbents filed for re-election, including 30 Democrats and 28 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oregon, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	25	2	0	0.0%	21	1	0	0.0%	46	3	0	0.0%
Senate	5	0	0	0.0%	7	1	0	0.0%	12	1	0	0.0%
Total	30	2	0	0.0%	28	2	0	0.0%	58	4	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oregon, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	44	2	0	0.0%	25	7	0	0.0%	69	9	0	0.0%
2012	31	1	1	3.2%	35	3	1	2.9%	66	4	2	3.0%
2014	38	3	0	0.0%	22	3	1	4.5%	60	6	1	1.7%
2016	30	2	0	0.0%	28	2	0	0.0%	58	4	0	0.0%

Pennsylvania

General election defeats

There were 228 seats up for election in Pennsylvania. Overall, 205 incumbents advanced to the general election, including 83 Democrats and 122 Republicans. Of that total, six incumbents lost—four Democrats and two Republicans—representing 2.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Pennsylvania, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	73	2	2.7%	111	2	1.8%	184	4	2.2%
Senate	10	2	20.0%	11	0	0.0%	21	2	9.5%
Total	83	4	4.8%	122	2	1.6%	205	6	2.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Pennsylvania, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	101	9	8.9%	106	0	0.0%	207	9	4.3%
2012	83	0	0.0%	113	1	0.9%	196	1	0.5%
2014	90	4	4.4%	108	0	0.0%	198	4	2.0%
2016	83	4	4.8%	122	2	1.6%	205	6	2.9%

Primary defeats

There were 228 seats up for election in Pennsylvania. Overall, 209 incumbents filed for re-election, including 89 Democrats and 120 Republicans. Of that total, four Democratic incumbents lost in primaries, representing 1.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Pennsylvania, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	78	15	4	5.1%	110	9	0	0.0%	188	24	4	2.1%
Senate	11	4	0	0.0%	10	0	0	0.0%	21	4	0	0.0%
Total	89	19	4	4.5%	120	9	0	0.0%	209	28	4	1.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Pennsylvania, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	100	20	0	0.0%	107	9	1	0.9%	207	29	1	0.5%
2012	88	17	4	4.5%	115	15	1	0.9%	203	32	5	2.5%
2014	95	30	5	5.3%	108	12	1	0.9%	203	42	6	3.0%
2016	89	19	4	4.5%	120	9	0	0.0%	209	28	4	1.9%

Rhode Island

General election defeats

There were 113 seats up for election in Rhode Island. Overall, 99 incumbents advanced to the general election, including 85 Democrats, 13 Republicans, and one independent. Of that total, two incumbents lost—one Democrat and one Republican—representing 2.0% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Rhode Island, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	55	1	1.8%	8	0	0.0%	64	1	1.6%
Senate	30	0	0.0%	5	1	20.0%	35	1	2.9%
Total	85	1	1.2%	13	1	7.7%	99	2	2.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Rhode Island, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	79	4	5.1%	8	0	0.0%	88	4	4.5%
2012	78	0	0.0%	15	4	26.7%	94	4	4.3%
2014	92	7	7.6%	9	0	0.0%	102	7	6.9%
2016	85	1	1.2%	13	1	7.7%	99	2	2.0%

Primary defeats

There were 113 seats up for election in Rhode Island. Overall, 105 incumbents filed for re-election, including 91 Democrats and 13 Republicans. Of that total, six Democratic incumbents lost in primaries, representing 5.7% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Rhode Island, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	59	12	4	6.8%	8	0	0	0.0%	68	12	4	5.9%
Senate	32	6	2	6.3%	5	0	0	0.0%	37	6	2	5.4%
Total	91	18	6	6.6%	13	0	0	0.0%	105	18	6	5.7%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Rhode Island, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	88	32	9	10.2%	9	2	1	11.1%	98	34	10	10.2%
2012	84	24	6	7.1%	15	2	0	0.0%	100	26	6	6.0%
2014	95	18	3	3.2%	9	0	0	0.0%	105	18	3	2.9%
2016	91	18	6	6.6%	13	0	0	0.0%	105	18	6	5.7%

South Carolina

General election defeats

There were 170 seats up for election in South Carolina. Overall, 144 incumbents advanced to the general election, including 56 Democrats and 88 Republicans. No incumbents who advanced to the general election lost.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Carolina, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	40	0	0.0%	66	0	0.0%	106	0	0.0%
Senate	16	0	0.0%	22	0	0.0%	38	0	0.0%
Total	56	0	0.0%	88	0	0.0%	144	0	0.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Carolina, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	48	3	6.3%	58	0	0.0%	106	3	2.8%
2012	55	0	0.0%	89	2	2.2%	144	2	1.4%
2014	41	0	0.0%	71	1	1.4%	112	1	0.9%
2016	56	0	0.0%	88	0	0.0%	144	0	0.0%

Primary defeats

There were 170 seats up for election in South Carolina. Overall, 153 incumbents filed for re-election, including 57 Democrats and 96 Republicans. Of that total, nine incumbents lost in primaries—one Democrat and eight Republicans—representing 5.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Carolina, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	40	8	0	0.0%	70	14	4	5.7%	110	22	4	3.6%
Senate	17	6	1	5.9%	26	14	4	15.4%	43	20	5	11.6%
Total	57	14	1	1.8%	96	28	8	8.3%	153	42	9	5.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Carolina, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	48	11	0	0.0%	64	15	5	7.8%	112	26	5	4.5%
2012	57	7	2	3.5%	91	16	3	3.3%	148	23	5	3.4%
2014	42	5	0	0.0%	73	15	2	2.7%	115	20	2	1.7%
2016	57	14	1	1.8%	96	28	8	8.3%	153	42	9	5.9%

South Dakota

General election defeats

There were 105 seats up for election in South Dakota. Overall, 60 incumbents advanced to the general election, including 10 Democrats and 50 Republicans. Of that total, two incumbents lost—one Democrat and one Republican—representing 3.3% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Dakota, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	6	0	0.0%	35	1	2.9%	41	1	2.4%
Senate	4	1	25.0%	15	0	0.0%	19	1	5.3%
Total	10	1	10.0%	50	1	2.0%	60	2	3.3%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Dakota, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	25	9	36.0%	44	0	0.0%	69	9	13.0%
2012	13	0	0.0%	53	4	7.5%	66	4	6.1%
2014	16	2	12.5%	58	1	1.7%	74	3	4.1%
2016	10	1	10.0%	50	1	2.0%	60	2	3.3%

Primary defeats

There were 105 seats up for election in South Dakota. Overall, 63 incumbents filed for re-election, including 10 Democrats and 53 Republicans. Of that total, two Republican incumbents lost in primaries, representing 3.2% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Dakota, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	6	0	0	0.0%	37	12	1	2.7%	43	12	1	2.3%
Senate	4	0	0	0.0%	16	6	1	6.3%	20	6	1	5.0%
Total	10	0	0	0.0%	53	18	2	3.8%	63	18	2	3.2%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Dakota, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	26	3	1	3.8%	45	4	0	0.0%	71	7	1	1.4%
2012	15	3	1	6.7%	59	22	4	6.8%	74	25	5	6.8%
2014	16	2	0	0.0%	58	15	0	0.0%	74	17	0	0.0%
2016	10	0	0	0.0%	53	18	2	3.8%	63	18	2	3.2%

Tennessee

General election defeats

There were 115 seats up for election in Tennessee. Overall, 106 incumbents advanced to the general election, including 25 Democrats and 81 Republicans. Of that total, two incumbents lost—one Democrat and one Republican—representing 1.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Tennessee, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	24	1	4.2%	67	1	1.5%	91	2	2.2%
Senate	1	0	0.0%	14	0	0.0%	15	0	0.0%
Total	25	1	4.0%	81	1	1.2%	106	2	1.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Tennessee, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	54	13	24.1%	49	0	0.0%	104	13	12.5%
2012	25	1	4.0%	60	1	1.7%	86	2	2.3%
2014	27	2	7.4%	69	0	0.0%	96	2	2.1%
2016	25	1	4.0%	81	1	1.2%	106	2	1.9%

Primary defeats

There were 115 seats up for election in Tennessee. Overall, 109 incumbents filed for re-election, including 26 Democrats and 83 Republicans. Of that total, two Republican incumbents lost in primaries, representing 1.8% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Tennessee, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	25	7	0	0.0%	69	20	2	2.9%	94	27	2	2.1%
Senate	1	1	0	0.0%	14	6	0	0.0%	15	7	0	0.0%
Total	26	8	0	0.0%	83	26	2	2.4%	109	34	2	1.8%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Tennessee, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	54	6	0	0.0%	51	6	2	3.9%	106	12	2	1.9%
2012	30	11	5	16.7%	67	24	7	10.4%	98	35	12	12.2%
2014	29	5	2	6.9%	75	20	6	8.0%	104	25	8	7.7%
2016	26	8	0	0.0%	83	26	2	2.4%	109	34	2	1.8%

Texas

General election defeats

There were 166 seats up for election in Texas. Overall, 144 incumbents advanced to the general election, including 53 Democrats, 90 Republicans, and one independent. Of that total, five incumbents lost—four Republicans and one independent—representing 3.5% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Texas, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	46	0	0.0%	84	4	4.8%	131	5^[10]	3.8%
Senate	7	0	0.0%	6	0	0.0%	13	0	0.0%
Total	53	0	0.0%	90	4	4.4%	144	5^[11]	3.5%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Texas, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	71	21	29.6%	80	0	0.0%	151	21	13.9%
2012	52	0	0.0%	83	3	3.6%	135	3	2.2%
2014	55	2	3.6%	83	0	0.0%	138	2	1.4%
2016	53	0	0.0%	90	4	4.4%	144	5	3.5%

Primary defeats

There were 166 seats up for election in Texas. Overall, 150 incumbents filed for re-election, including 54 Democrats and 95 Republicans. Of that total, five Republican incumbents lost in primaries, representing 3.3% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Texas, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	46	10	0	0.0%	89	33	5	5.6%	136	43	5	3.7%
Senate	8	3	0	0.0%	6	0	0	0.0%	14	3	0	0.0%
Total	54	13	0	0.0%	95	33	5	5.3%	150	46	5	3.3%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Texas, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	75	8	4	5.3%	82	20	3	3.7%	157	28	7	4.5%
2012	53	8	0	0.0%	94	43	11	11.7%	147	51	11	7.5%
2014	57	11	2	3.5%	93	28	9	9.7%	150	39	11	7.3%
2016	54	13	0	0.0%	95	33	5	5.3%	150	46	5	3.3%

Utah

General election defeats

There were 90 seats up for election in Utah. Overall, 76 incumbents advanced to the general election, including 13 Democrats and 63 Republicans. Of that total, two incumbents lost—one Democrat and one Republican—representing 2.6% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Utah, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	12	1	8.3%	51	1	2.0%	63	2	3.2%
Senate	1	0	0.0%	12	0	0.0%	13	0	0.0%
Total	13	1	7.7%	63	1	1.6%	76	2	2.6%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Utah, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	27	6	22.2%	52	0	0.0%	79	6	7.6%
2012	15	1	6.7%	55	1	1.8%	70	2	2.9%
2014	13	1	7.7%	61	0	0.0%	74	1	1.4%
2016	13	1	7.7%	63	1	1.6%	76	2	2.6%

Primary defeats

There were 90 seats up for election in Utah. Overall, 76 incumbents filed for re-election, including 13 Democrats and 63 Republicans. Of that total, three Republican incumbents lost in primaries, representing 3.9% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Utah, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	12	0	0	0.0%	53	4	3	5.7%	65	4	3	4.6%
Senate	1	0	0	0.0%	10	2	0	0.0%	11	2	0	0.0%
Total	13	0	0	0.0%	63	6	3	4.8%	76	6	3	3.9%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Utah, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	27	1	0	0.0%	54	8	2	3.7%	81	9	2	2.5%
2012	17	2	2	11.8%	61	12	6	9.8%	78	14	8	10.3%
2014	13	0	0	0.0%	64	4	3	4.7%	77	4	3	3.9%
2016	13	0	0	0.0%	63	6	3	4.8%	76	6	3	3.9%

Vermont

General election defeats

There were 180 seats up for election in Vermont. Overall, 151 incumbents advanced to the general election, including 88 Democrats, 57 Republicans, and six independents. Of that total, 10 incumbents lost—six Democrats and four Republicans—representing 6.6% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Vermont, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	69	6	8.7%	50	3	6.0%	125	9	7.2%
Senate	19	0	0.0%	7	1	14.3%	26	1	3.8%
Total	88	6	6.8%	57	4	7.0%	151	10	6.6%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Vermont, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	106	4	3.8%	47	2	4.3%	158	6	3.8%
2012	106	3	2.8%	45	3	6.7%	155	6	3.9%
2014	105	11	10.5%	44	0	0.0%	152	11	7.2%
2016	88	6	6.8%	57	4	7.0%	151	10	6.6%

Primary defeats

There were 180 seats up for election in Vermont. Overall, 152 incumbents filed for re-election, including 88 Democrats and 58 Republicans. Of that total, one Republican incumbent lost in a primary, representing 0.7% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Vermont, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	69	13	0	0.0%	50	2	0	0.0%	125	15	0	0.0%
Senate	19	10	0	0.0%	8	2	1	12.5%	27	12	1	3.7%
Total	88	23	0	0.0%	58	4	1	1.7%	152	27	1	0.7%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Vermont, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	107	8	0	0.0%	47	5	0	0.0%	159	13	0	0.0%
2012	105	11	0	0.0%	45	1	0	0.0%	155	12	0	0.0%
2014	105	5	0	0.0%	45	3	1	2.2%	153	8	1	0.7%
2016	88	23	0	0.0%	58	4	1	1.7%	152	27	1	0.7%

Washington

General election defeats

There were 124 seats up for election in Washington. Overall, 102 incumbents advanced to the general election, including 51 Democrats and 51 Republicans. Of that total, three Republican incumbents lost, representing 2.9% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Washington, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	42	0	0.0%	41	2	4.9%	83	2	2.4%
Senate	9	0	0.0%	10	1	10.0%	19	1	5.3%
Total	51	0	0.0%	51	3	5.9%	102	3	2.9%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Washington, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	64	8	12.5%	38	1	2.6%	102	9	8.8%
2012	53	1	1.9%	44	2	4.5%	97	3	3.1%
2014	63	4	6.3%	47	0	0.0%	110	4	3.6%
2016	51	0	0.0%	51	3	5.9%	102	3	2.9%

Primary defeats

There were 124 seats up for election in Washington. Overall, 103 incumbents filed for re-election, including 52 Democrats and 51 Republicans. Of that total, one Democratic incumbent lost in primaries, representing 1.0% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Washington, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	43	14	1	2.3%	41	13	0	0.0%	84	27	1	1.2%
Senate	9	2	0	0.0%	10	3	0	0.0%	19	5	0	0.0%
Total	52	16	1	1.9%	51	16	0	0.0%	103	32	1	1.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Washington, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	65	21	1	1.5%	38	3	0	0.0%	103	24	1	1.0%
2012	53	10	0	0.0%	45	5	1	2.2%	98	15	1	1.0%
2014	63	15	0	0.0%	48	8	1	2.1%	111	23	1	0.9%
2016	52	16	1	1.9%	51	16	0	0.0%	103	32	1	1.0%

West Virginia

General election defeats

There were 117 seats up for election in West Virginia. Overall, 90 incumbents advanced to the general election, including 34 Democrats and 56 Republicans. Of that total, 14 incumbents lost—eight Democrats and six Republicans—representing 15.6% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in West Virginia, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	28	6	21.4%	50	5	10.0%	78	11	14.1%
Senate	6	2	33.3%	6	1	16.7%	12	3	25.0%
Total	34	8	23.5%	56	6	10.7%	90	14	15.6%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in West Virginia, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	74	5	6.8%	25	0	0.0%	99	5	5.1%
2012	64	7	10.9%	32	1	3.1%	96	8	8.3%
2014	54	22	40.7%	44	1	2.3%	98	23	23.5%
2016	34	8	23.5%	56	6	10.7%	90	14	15.6%

Primary defeats

There were 117 seats up for election in West Virginia. Overall, 93 incumbents filed for re-election, including 35 Democrats and 58 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 2.2% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in West Virginia, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	28	18	0	0.0%	51	14	0	0.0%	79	32	0	0.0%
Senate	7	2	1	14.3%	7	4	1	14.3%	14	6	2	14.3%
Total	35	20	1	2.9%	58	18	1	1.7%	93	38	2	2.2%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in West Virginia, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	76	46	2	2.6%	27	6	1	3.7%	103	52	3	2.9%
2012	66	37	2	3.0%	32	8	0	0.0%	98	45	2	2.0%
2014	60	19	6	10.0%	46	15	1	2.2%	106	34	7	6.6%
2016	35	20	1	2.9%	58	18	1	1.7%	93	38	2	2.2%

Wisconsin

General election defeats

There were 115 seats up for election in Wisconsin. Overall, 102 incumbents advanced to the general election, including 39 Democrats and 63 Republicans. Of that total, two Democratic incumbents lost, representing 2.0% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wisconsin, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	32	1	3.1%	57	0	0.0%	89	1	1.1%
Senate	7	1	14.3%	6	0	0.0%	13	1	7.7%
Total	39	2	5.1%	63	0	0.0%	102	2	2.0%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wisconsin, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	51	13	25.5%	40	0	0.0%	92	13	14.1%
2012	34	2	5.9%	58	3	5.2%	92	5	5.4%
2014	36	3	8.3%	51	0	0.0%	87	3	3.4%
2016	39	2	5.1%	63	0	0.0%	102	2	2.0%

Primary defeats

There were 115 seats up for election in Wisconsin. Overall, 102 incumbents filed for re-election, including 39 Democrats and 63 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wisconsin, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	32	6	0	0.0%	57	0	0	0.0%	89	6	0	0.0%
Senate	7	2	0	0.0%	6	0	0	0.0%	13	2	0	0.0%
Total	39	8	0	0.0%	63	0	0	0.0%	102	8	0	0.0%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wisconsin, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	52	6	1	1.9%	40	7	0	0.0%	93	13	1	1.1%
2012	36	9	2	5.6%	58	6	0	0.0%	94	15	2	2.1%
2014	36	2	0	0.0%	51	1	0	0.0%	87	3	0	0.0%
2016	39	8	0	0.0%	63	0	0	0.0%	102	8	0	0.0%

Wyoming

General election defeats

There were 75 seats up for election in Wyoming. Overall, 53 incumbents advanced to the general election, including 9 Democrats and 44 Republicans. Of that total, 3 incumbents lost—two Democrats and one Republican—representing 5.7% of incumbents who advanced to the general election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wyoming, 2016
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	8	1	12.5%	36	1	2.8%	44	2	4.5%
Senate	1	1	100.0%	8	0	0.0%	9	1	11.1%
Total	9	2	22.2%	44	1	2.3%	53	3	5.7%

Historical general election defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wyoming, 2010-2016
Year
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
2010	18	7	38.9%	42	0	0.0%	60	7	11.7%
2012	9	1	11.1%	48	0	0.0%	57	1	1.8%
2014	9	0	0.0%	51	1	2.0%	60	1	1.7%
2016	9	2	22.2%	44	1	2.3%	53	3	5.7%

Primary defeats

There were 75 seats up for election in Wyoming. Overall, 55 incumbents filed for re-election, including nine Democrats and 46 Republicans. Of that total, three Republican incumbents lost in primaries, representing 5.5% of incumbents who filed for re-election.

Statistics from 2016 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wyoming, 2016
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	8	0	0	0.0%	38	18	3	7.9%	46	18	3	6.5%
Senate	1	0	0	0.0%	8	2	0	0.0%	9	2	0	0.0%
Total	9	0	0	0.0%	46	20	3	6.5%	55	20	3	5.5%

Historical primary defeat statistics are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wyoming, 2010-2016
Year
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
2010	18	0	0	0.0%	42	15	0	0.0%	60	15	0	0.0%
2012	9	0	0	0.0%	51	21	3	5.9%	60	21	3	5.0%
2014	9	0	0	0.0%	55	26	4	7.3%	64	26	4	6.3%
2016	9	0	0	0.0%	46	20	3	6.5%	55	20	3	5.5%

Footnotes

↑ Incumbents may also be defeated in other nominating contests such as conventions. Ballotpedia counts an incumbent defeat in a convention as a defeat in a primary.
↑ 'The general election figure does not include one incumbent defeated in primaries who ran in the general election and lost again. This incumbent is recorded as a primary defeat only.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Does not include one Democratic incumbent who lost in a primary, ran in the general election, and lost again.
↑ Includes one independent or minor party candidate who lost in the general election.
↑ Includes one independent or minor party candidate who lost in the general election.

[1] Incumbents may also be defeated in other nominating contests such as conventions. Ballotpedia counts an incumbent defeat in a convention as a defeat in a primary.

[2] 'The general election figure does not include one incumbent defeated in primaries who ran in the general election and lost again. This incumbent is recorded as a primary defeat only.

[3] Includes one independent or minor party candidate who lost in the general election.

[4] Includes one independent or minor party candidate who lost in the general election.

[5] Includes one independent or minor party candidate who lost in the general election.

[6] Includes one independent or minor party candidate who lost in the general election.

[7] Includes one independent or minor party candidate who lost in the general election.

[8] Includes one independent or minor party candidate who lost in the general election.

[9] Does not include one Democratic incumbent who lost in a primary, ran in the general election, and lost again.

[10] Includes one independent or minor party candidate who lost in the general election.

[11] Includes one independent or minor party candidate who lost in the general election.

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Incumbents defeated in state legislative elections, 2016

Incumbents defeated in general elections

In 2016

Historical comparison

Incumbents defeated in primaries

In 2016

Historical comparison

By state

Overview

General elections

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Alaska

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Arizona

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Arkansas

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Colorado

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Connecticut

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Delaware

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Florida

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Georgia

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Hawaii

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Idaho

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Illinois

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Indiana

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Iowa

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Kansas

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Kentucky

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Maine

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Massachusetts

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Michigan

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Minnesota

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Missouri

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Montana

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Nebraska

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