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Illinois' 12th Congressional District election, 2024

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2026
2022
Illinois' 12th Congressional District
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Democratic primary
Republican primary
General election
Election details
Filing deadline: December 4, 2023
Primary: March 19, 2024
General: November 5, 2024
How to vote
Poll times: 6 a.m. to 7 p.m.
Voting in Illinois
Race ratings
Cook Political Report: Solid Republican
DDHQ and The Hill: Safe Republican
Inside Elections: Solid Republican
Sabato's Crystal Ball: Safe Republican
Ballotpedia analysis
U.S. Senate battlegrounds
U.S. House battlegrounds
Federal and state primary competitiveness
Ballotpedia's Election Analysis Hub, 2024
See also
Illinois' 12th Congressional District
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Illinois elections, 2024
U.S. Congress elections, 2024
U.S. Senate elections, 2024
U.S. House elections, 2024

All U.S. House districts, including the 12th Congressional District of Illinois, held elections in 2024. The general election was November 5, 2024. The primary was March 19, 2024. The filing deadline was December 4, 2023. The outcome of this race affected the partisan balance of the U.S. House of Representatives in the 119th Congress. All 435 House districts were up for election.

At the time of the election, Republicans held a 220-212 majority with three vacancies.[1] As a result of the election, Republicans retained control of the U.S. House, winning 220 seats to Democrats' 215.[2] To read more about the 2024 U.S. House elections, click here.

In the 2022 election in this district, the Republican candidate won 75.0%-25.0%. Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Donald Trump (R) would have defeated Joe Biden (D) 70.5%-27.7%.[3]

For more information about the primaries in this election, click on the links below:

Candidates and election results

General election

General election for U.S. House Illinois District 12

Incumbent Mike Bost defeated Brian Roberts in the general election for U.S. House Illinois District 12 on November 5, 2024.

Candidate
%
Votes
Image of Mike Bost
Mike Bost (R)
 
74.2
 
272,754
Image of Brian Roberts
Brian Roberts (D)
 
25.8
 
94,875

Total votes: 367,629
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary election

Democratic primary for U.S. House Illinois District 12

Brian Roberts defeated Preston Nelson in the Democratic primary for U.S. House Illinois District 12 on March 19, 2024.

Candidate
%
Votes
Image of Brian Roberts
Brian Roberts
 
60.1
 
10,775
Image of Preston Nelson
Preston Nelson
 
39.9
 
7,151

Total votes: 17,926
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Republican primary election

Republican primary for U.S. House Illinois District 12

Incumbent Mike Bost defeated Darren Bailey in the Republican primary for U.S. House Illinois District 12 on March 19, 2024.

Candidate
%
Votes
Image of Mike Bost
Mike Bost
 
51.4
 
48,770
Image of Darren Bailey
Darren Bailey
 
48.6
 
46,035

Total votes: 94,805
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Candidate profiles

This section includes candidate profiles that may be created in one of two ways: either the candidate completed Ballotpedia's Candidate Connection survey, or Ballotpedia staff may compile a profile based on campaign websites, advertisements, and public statements after identifying the candidate as noteworthy. For more on how we select candidates to include, click here.

Image of Mike Bost

WebsiteFacebookTwitterYouTube

Party: Republican Party

Incumbent: Yes

Political Office: 

Biography:  Bost graduated from Murphysboro High School in 1979 and enlisted with the United States Marine Corps. From 1979 to 1982, he served as a trained electronic specialist and radar repairman. After leaving the Marine Corps, Bost served on the Jackson County Board and as treasurer of Murphysboro Township. In 1993, he became a certified firefighter. Bost also worked at Bost Trucking Service, a business owned by his family.



Key Messages

The following key messages were curated by Ballotpedia staff. For more on how we identify key messages, click here.


Bost contrasted his legislative experience with Bailey's. “The people of the Illinois 12th actually have a voice that is heard... Not a person that’s there to say ‘No,’ and also that has no experience whatsoever in getting legislation moved,” Bost said.


Bost said his positions on abortion and gun policy were representative of his conservative bona fides. "I’ve got a 100% rating with pro life. I got 100%, and I’ve always been endorsed by the NRA and every other gun group out there," Bost said.


On immigration, Bost said: "The invasion at our southern border is out of control. Terrorists are walking right into our country. Border patrol agents are being overwhelmed, all while Joe Biden continues doing nothing about it. I’m fighting to bring back President Trump’s America First policies that kept us safe."


Show sources

This information was current as of the candidate's run for U.S. House Illinois District 12 in 2024.

Voting information

See also: Voting in Illinois

Election information in Illinois: Nov. 5, 2024, election.

What was the voter registration deadline?

  • In-person: Nov. 5, 2024
  • By mail: Postmarked by Oct. 8, 2024
  • Online: Oct. 20, 2024

Was absentee/mail-in voting available to all voters?

Yes

What was the absentee/mail-in ballot request deadline?

  • In-person: Nov. 4, 2024
  • By mail: Received by Oct. 31, 2024
  • Online: Oct. 31, 2024

What was the absentee/mail-in ballot return deadline?

  • In-person: Nov. 5, 2024
  • By mail: Postmarked by Nov. 5, 2024

Was early voting available to all voters?

Yes

What were the early voting start and end dates?

Sep. 26, 2024 to Nov. 4, 2024

Were all voters required to present ID at the polls? If so, was a photo or non-photo ID required?

N/A

When were polls open on Election Day?

6:00 a.m. - 7:00 p.m. (CST)


Ballotpedia's Candidate Connection survey responses

Ballotpedia asks all federal, state, and local candidates to complete a survey and share what motivates them on political and personal levels. Candidates are asked three required questions for this survey, but they may answer additional optional questions as well.

No candidate in this race completed Ballotpedia's Candidate Connection survey.

Campaign finance

Name Party Receipts* Disbursements** Cash on hand Date
Mike Bost Republican Party $3,157,656 $3,195,231 $352,296 As of December 31, 2024
Preston Nelson Democratic Party $0 $0 $0 Data not available***
Brian Roberts Democratic Party $0 $0 $0 Data not available***
Darren Bailey Republican Party $640,198 $640,197 $1 As of December 31, 2024

Source: Federal Elections Commission, "Campaign finance data," 2024. This product uses the openFEC API but is not endorsed or certified by the Federal Election Commission (FEC).

* According to the FEC, "Receipts are anything of value (money, goods, services or property) received by a political committee."
** According to the FEC, a disbursement "is a purchase, payment, distribution, loan, advance, deposit or gift of money or anything of value to influence a federal election," plus other kinds of payments not made to influence a federal election.
*** Candidate either did not report any receipts or disbursements to the FEC, or Ballotpedia did not find an FEC candidate ID.

General election race ratings

See also: Race rating definitions and methods

Ballotpedia provides race ratings from four outlets: The Cook Political Report, Inside Elections, Sabato's Crystal Ball, and DDHQ/The Hill. Each race rating indicates if one party is perceived to have an advantage in the race and, if so, the degree of advantage:

  • Safe and Solid ratings indicate that one party has a clear edge and the race is not competitive.
  • Likely ratings indicate that one party has a clear edge, but an upset is possible.
  • Lean ratings indicate that one party has a small edge, but the race is competitive.[4]
  • Toss-up ratings indicate that neither party has an advantage.

Race ratings are informed by a number of factors, including polling, candidate quality, and election result history in the race's district or state.[5][6][7]

Race ratings: Illinois' 12th Congressional District election, 2024
Race trackerRace ratings
November 5, 2024October 29, 2024October 22, 2024October 15, 2024
The Cook Political Report with Amy WalterSolid RepublicanSolid RepublicanSolid RepublicanSolid Republican
Decision Desk HQ and The HillSafe RepublicanSafe RepublicanSafe RepublicanSafe Republican
Inside Elections with Nathan L. GonzalesSolid RepublicanSolid RepublicanSolid RepublicanSolid Republican
Larry J. Sabato's Crystal BallSafe RepublicanSafe RepublicanSafe RepublicanSafe Republican
Note: Ballotpedia reviews external race ratings every week throughout the election season and posts weekly updates even if the media outlets have not revised their ratings during that week.

Ballot access

The table below details filing requirements for U.S. House candidates in Illinois in the 2024 election cycle. For additional information on candidate ballot access requirements in Illinois, click here.

Filing requirements for U.S. House candidates, 2024
State Office Party Signatures required Filing fee Filing deadline Source
Illinois U.S. House Democratic 685[8] N/A 12/4/2023 Source
Illinois U.S. House Republican 536[9] N/A 12/4/2023 Source
Illinois U.S. House Unaffiliated 12,188[10] N/A 6/24/2024 Source

District analysis

Click the tabs below to view information about voter composition, past elections, and demographics in both the district and the state.

  • District map - A map of the district in place for the election.
  • Competitiveness - Information about the competitiveness of 2024 U.S. House elections in the state.
  • Presidential elections - Information about presidential elections in the district and the state.
  • State party control - The partisan makeup of the state's congressional delegation and state government.


Below was the map in use at the time of the election. Click the map below to enlarge it.

2023_01_03_il_congressional_district_012.jpg
See also: Primary election competitiveness in state and federal government, 2024

This section contains data on U.S. House primary election competitiveness in Illinois.

Illinois U.S. House competitiveness, 2014-2024
Year Districts/
offices
Seats Open seats Candidates Possible primaries Contested Democratic primaries Contested Republican primaries % of contested primaries Incumbents in contested primaries % of incumbents in contested primaries
2024 17 17 0 46 34 5 6 32.4% 5 29.4%
2022 17 17 4 95 34 8 11 55.9% 7 46.7%
2020 18 18 1 73 36 13 8 58.3% 10 58.8%
2018 18 18 1 79 36 12 8 55.6% 7 41.2%
2016 18 18 1 49 36 8 6 38.9% 7 41.2%
2014 18 18 0 50 36 4 5 25.0% 3 16.7%

Post-filing deadline analysis

The following analysis covers all U.S. House districts up for election in Illinois in 2024. Information below was calculated on 2/16/2024, and may differ from information shown in the table above due to candidate replacements and withdrawals after that time. </noinclude>

Forty-nine candidates filed to run for Illinois' 17 U.S. House districts, including 24 Democrats and 25 Republicans. That's 2.59 candidates per district. In 2022, the first election after the number of Congressional districts in Illinois decreased from 18 to 17, 5.59 candidates filed per district.

In 2020, when the state still had 18 Congressional districts, 4.1 candidates ran. In 2018, 4.4 candidates did.

The number of total candidates who ran for the U.S. House in 2024 was the fewest since at least 2014.

All incumbents ran for re-election this year, meaning no seats were open for the first time since 2014. In 2022, four seats were open, and one seat was open in 2020, 2028, and 2016.

Six candidates—five Democrats and one Republican—ran in the 7th district, including incumbent Danny K. Davis (D). That was the most candidates who ran for a single district in 2024.

Eleven primaries were contested in 2024—five Democratic and six Republican. That was the fewest contested primaries since 2014, when nine were.

Five incumbents faced primary challengers—four Democrats and one Republican. That was also the fewest since 2014, when three incumbents faced primary challengers.

The 4th District was guaranteed to Democrats because no Republican candidates filed. The 15th and Illinois' 16th Congressional District were guaranteed to Republicans because no Democrats filed.

Partisan Voter Index

See also: The Cook Political Report's Partisan Voter Index

Heading into the 2024 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+24. This meant that in those two presidential elections, this district's results were 24 percentage points more Republican than the national average. This made Illinois' 12th the 18th most Republican district nationally.[11]

2020 presidential election results

The table below shows what the vote in the 2020 presidential election would have been in this district. The presidential election data was compiled by Daily Kos.

2020 presidential results in Illinois' 12th based on 2024 district lines
Joe Biden Democratic Party Donald Trump Republican Party
27.7% 70.5%

Inside Elections Baselines

See also: Inside Elections

Inside Elections' Baseline is a figure that analyzes all federal and statewide election results from the district over the past four election cycles. The results are combined in an index estimating the strength of a typical Democratic or Republican candidate in the congressional district.[12] The table below displays the Baseline data for this district.

Inside Elections Baseline for 2024
Democratic Baseline Democratic Party Republican Baseline Republican Party Difference
30.1 66.5 D+36.4

Presidential voting history

See also: Presidential election in Illinois, 2020

Illinois presidential election results (1900-2020)

  • 16 Democratic wins
  • 15 Republican wins
Year 1900 1904 1908 1912 1916 1920 1924 1928 1932 1936 1940 1944 1948 1952 1956 1960 1964 1968 1972 1976 1980 1984 1988 1992 1996 2000 2004 2008 2012 2016 2020
Winning Party R R R D R R R R D D D D D R R D D R R R R R R D D D D D D D D
See also: Party control of Illinois state government

Congressional delegation

The table below displays the partisan composition of Illinois' congressional delegation as of May 2024.

Congressional Partisan Breakdown from Illinois
Party U.S. Senate U.S. House Total
Democratic 2 14 16
Republican 0 3 3
Independent 0 0 0
Vacancies 0 0 0
Total 2 17 19

State executive

The table below displays the officeholders in Illinois' top four state executive offices as of May 2024.

State executive officials in Illinois, May 2024
Office Officeholder
Governor Democratic Party J.B. Pritzker
Lieutenant Governor Democratic Party Juliana Stratton
Secretary of State Democratic Party Alexi Giannoulias
Attorney General Democratic Party Kwame Raoul

State legislature

Illinois State Senate

Party As of February 2024
     Democratic Party 40
     Republican Party 19
     Other 0
     Vacancies 0
Total 59

Illinois House of Representatives

Party As of February 2024
     Democratic Party 78
     Republican Party 40
     Other 0
     Vacancies 0
Total 118

Trifecta control

The table below shows the state's trifecta status from 1992 until the 2024 election.

Illinois Party Control: 1992-2024
Eighteen years of Democratic trifectas  •  Two years of Republican trifectas
Scroll left and right on the table below to view more years.

Year 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Governor R R R R R R R R R R R D D D D D D D D D D D D R R R R D D D D D D
Senate D R R R R R R R R R R D D D D D D D D D D D D D D D D D D D D D D
House D D D R R D D D D D D D D D D D D D D D D D D D D D D D D D D D D

District history

The section below details election results for this office in elections dating back to 2018.

2022

See also: Illinois' 12th Congressional District election, 2022

General election

General election for U.S. House Illinois District 12

Incumbent Mike Bost defeated Homer Markel in the general election for U.S. House Illinois District 12 on November 8, 2022.

Candidate
%
Votes
Image of Mike Bost
Mike Bost (R)
 
75.0
 
218,379
Image of Homer Markel
Homer Markel (D) Candidate Connection
 
25.0
 
72,791
 Other/Write-in votes
 
0.0
 
1

Total votes: 291,171
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Democratic primary election

Democratic primary for U.S. House Illinois District 12

Homer Markel defeated Joshua Qualls in the Democratic primary for U.S. House Illinois District 12 on June 28, 2022.

Candidate
%
Votes
Image of Homer Markel
Homer Markel Candidate Connection
 
56.7
 
11,068
Image of Joshua Qualls
Joshua Qualls
 
43.3
 
8,438

Total votes: 19,506
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Withdrawn or disqualified candidates

Republican primary election

Republican primary for U.S. House Illinois District 12

Incumbent Mike Bost advanced from the Republican primary for U.S. House Illinois District 12 on June 28, 2022.

Candidate
%
Votes
Image of Mike Bost
Mike Bost
 
100.0
 
88,681

Total votes: 88,681
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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2020

See also: Illinois' 12th Congressional District election, 2020

General election

General election for U.S. House Illinois District 12

Incumbent Mike Bost defeated Ray Lenzi in the general election for U.S. House Illinois District 12 on November 3, 2020.

Candidate
%
Votes
Image of Mike Bost
Mike Bost (R)
 
60.4
 
194,839
Image of Ray Lenzi
Ray Lenzi (D) Candidate Connection
 
39.6
 
127,577

Total votes: 322,416
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Democratic primary election

Democratic primary for U.S. House Illinois District 12

Ray Lenzi defeated Joel Funk in the Democratic primary for U.S. House Illinois District 12 on March 17, 2020.

Candidate
%
Votes
Image of Ray Lenzi
Ray Lenzi Candidate Connection
 
50.3
 
27,015
Image of Joel Funk
Joel Funk Candidate Connection
 
49.7
 
26,648

Total votes: 53,663
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Republican primary election

Republican primary for U.S. House Illinois District 12

Incumbent Mike Bost advanced from the Republican primary for U.S. House Illinois District 12 on March 17, 2020.

Candidate
%
Votes
Image of Mike Bost
Mike Bost
 
100.0
 
40,222

Total votes: 40,222
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

2018

See also: Illinois' 12th Congressional District election, 2018

General election

General election for U.S. House Illinois District 12

Incumbent Mike Bost defeated Brendan Kelly and Randy Auxier in the general election for U.S. House Illinois District 12 on November 6, 2018.

Candidate
%
Votes
Image of Mike Bost
Mike Bost (R)
 
51.6
 
134,884
Image of Brendan Kelly
Brendan Kelly (D)
 
45.4
 
118,724
Image of Randy Auxier
Randy Auxier (G)
 
3.0
 
7,935

Total votes: 261,543
(100.00% precincts reporting)
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Democratic primary election

Democratic primary for U.S. House Illinois District 12

Brendan Kelly defeated David Bequette in the Democratic primary for U.S. House Illinois District 12 on March 20, 2018.

Candidate
%
Votes
Image of Brendan Kelly
Brendan Kelly
 
81.0
 
40,555
Image of David Bequette
David Bequette
 
19.0
 
9,526

Total votes: 50,081
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

Republican primary election

Republican primary for U.S. House Illinois District 12

Incumbent Mike Bost defeated Preston Nelson in the Republican primary for U.S. House Illinois District 12 on March 20, 2018.

Candidate
%
Votes
Image of Mike Bost
Mike Bost
 
83.5
 
31,658
Image of Preston Nelson
Preston Nelson
 
16.5
 
6,258

Total votes: 37,916
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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Green primary election

Green primary for U.S. House Illinois District 12

Randy Auxier advanced from the Green primary for U.S. House Illinois District 12 on March 20, 2018.

Candidate
%
Votes
Image of Randy Auxier
Randy Auxier
 
100.0
 
131

Total votes: 131
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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See also

Illinois 2024 primaries 2024 U.S. Congress elections
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External links

Footnotes

  1. A majority in the U.S. House when there are no vacancies is 218 seats.
  2. These figures include the seat of Rep. Matt Gaetz (R-Fla.), who resigned on Nov. 13, 2024, after winning re-election.
  3. Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
  4. Inside Elections also uses Tilt ratings to indicate an even smaller advantage and greater competitiveness.
  5. Amee LaTour, "Email correspondence with Nathan Gonzalez," April 19, 2018
  6. Amee LaTour, "Email correspondence with Kyle Kondik," April 19, 2018
  7. Amee LaTour, "Email correspondence with Charlie Cook," April 22, 2018
  8. Average of all congressional districts.
  9. Average of all congressional districts.
  10. Average of all congressional districts.
  11. Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed January 10, 2024
  12. Inside Elections, "Methodology: Inside Elections’ Baseline by Congressional District," December 8, 2023


Senators
Representatives
District 1
District 2
District 3
District 4
District 5
District 6
District 7
District 8
District 9
District 10
District 11
District 12
Mike Bost (R)
District 13
District 14
District 15
District 16
District 17
Democratic Party (16)
Republican Party (3)