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U.S. House districts won by Hillary Clinton and a Republican in 2016
There were 25 Republican-held U.S. House districts up for election in 2018 that Hillary Clinton (D) won in the 2016 presidential election. Incumbents did not seek re-election in eight of the 25 districts.
Twenty-two of the Republican-held districts flipped and elected a Democrat in 2018. Click here for a table with the election results and 2012 and 2016 presidential margins in each district. The three districts Republicans held on to were defended by incumbents.
The 25 districts voted for Clinton by as many as 28.2 percentage points and as few as 1.1 percentage points. In 2012, 13 voted for Mitt Romney (R) and 12 voted for Barack Obama (D). Although they were scattered across the country, 11 of the districts were located in California or Pennsylvania.
Four districts did not exist during the 2016 election and were created after the Pennsylvania Supreme Court ruled that the state's previous congressional map was unconstitutionally gerrymandered to favor Republicans. The redrawing increased the number of Clinton/Republican districts in Pennsylvania from two to four. Read more below.
Click here to see the 13 Democratic-held districts won by Donald Trump (R) in 2016.
2018 election results
The following table shows the 2018 election results and 2016 and 2012 presidential margins for Republican-held U.S. U.S. House districts won by Hillary Clinton in 2016.
Map of Republican-held districts won by Clinton
2018 redistricting in Pennsylvania
On February 19, 2018, the Pennsylvania Supreme Court adopted a new congressional district map after ruling that the original map constituted an illegal partisan gerrymander. District locations and numbers were changed by the new map. Click here for more information about the ruling.
Prior to the redistricting, there were two districts that elected a Republican and voted for Clinton: the old 6th District represented by Ryan Costello (R) and the old 7th District represented by Pat Meehan (R). After the redistricting, there were four districts that closely resembled an old district with a Republican incumbent and voted for Clinton: the new 1st (Brian Fitzpatrick), the new 5th (Pat Meehan), the new 6th (Ryan Costello), and the new 7th (Charlie Dent). Only Fitzpatrick filed to run for re-election in the new district. The other incumbents either resigned or retired.
The chart below compares the new districts with the old districts that were the most geographically similar to them.
Split congressional districts historically
From 1900 to 2016, the percentage of congressional districts that voted for a presidential candidate of one party and a U.S. representative from a different party ranged from 1.6 percent (five districts) in 1904 to 44.1 percent (192 districts) in 1972.[10] The 2016 election had the sixth fewest split districts since 1904 with 8.0 percent (35 total).
Click on the box below to see the data used in the graph.
| Split congressional districts, 1900-2016 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Year | Districts analyzed[11] | Split districts | Split districts (%) | ||||||||||
| 1900 | 295 | 10 | 3.4% | ||||||||||
| 1904 | 310 | 5 | 1.6% | ||||||||||
| 1908 | 314 | 21 | 6.7% | ||||||||||
| 1912 | 333 | 84 | 25.2% | ||||||||||
| 1916 | 333 | 35 | 10.5% | ||||||||||
| 1920 | 344 | 11 | 3.2% | ||||||||||
| 1924 | 356 | 42 | 11.8% | ||||||||||
| 1928 | 359 | 68 | 18.9% | ||||||||||
| 1932 | 355 | 50 | 14.1% | ||||||||||
| 1936 | 361 | 51 | 14.1% | ||||||||||
| 1940 | 362 | 53 | 14.6% | ||||||||||
| 1944 | 367 | 41 | 11.2% | ||||||||||
| 1948 | 422 | 90 | 21.3% | ||||||||||
| 1952 | 435 | 84 | 19.3% | ||||||||||
| 1956 | 435 | 130 | 29.9% | ||||||||||
| 1960 | 437 | 114 | 26.1% | ||||||||||
| 1964 | 435 | 145 | 33.3% | ||||||||||
| 1968 | 435 | 139 | 32.0% | ||||||||||
| 1972 | 435 | 192 | 44.1% | ||||||||||
| 1976 | 435 | 124 | 28.5% | ||||||||||
| 1980 | 435 | 143 | 32.9% | ||||||||||
| 1984 | 435 | 190 | 43.7% | ||||||||||
| 1988 | 435 | 148 | 34.0% | ||||||||||
| 1992 | 435 | 100 | 23.0% | ||||||||||
| 1996 | 435 | 110 | 25.3% | ||||||||||
| 2000 | 435 | 86 | 19.8% | ||||||||||
| 2004 | 435 | 59 | 13.6% | ||||||||||
| 2008 | 435 | 83 | 19.1% | ||||||||||
| 2012 | 424[12] | 25 | 5.9% | ||||||||||
| 2016 | 435 | 35[13] | 8.0% | ||||||||||
| Source: Brookings Institute | |||||||||||||
See also
- U.S. House battlegrounds, 2018
- United States Congress elections, 2018
- United States House of Representatives elections, 2018
- United States House of Representatives
Footnotes
- ↑ The new 1st district was created in early 2018 due to court-ordered redistricting and most closely resembles the old 8th District held by Fitzpatrick. Click here to read more.
- ↑ The new 5th district was created in early 2018 due to court-ordered redistricting and most closely resembles the old 7th District held by Meehan. Click here to read more.
- ↑ The new 6th district was created in early 2018 due to court-ordered redistricting and most closely resembles the old 6th District held by Costello. Click here to read more.
- ↑ The new 7th district was created in early 2018 due to court-ordered redistricting and most closely resembles the old 15th District held by Dent. Click here to read more.
- ↑ The old 1st and 11th Districts did not make up a plurality of any of the new districts. The 1st District went for Hillary Clinton by 61.3 percentage points and was represented by Bob Brady (D). The 11th District went for Donald Trump by 23.8 percentage points and was represented by Lou Barletta (R).
- ↑ District 13 incumbent Brendan Boyle (D) filed for re-election in the new 2nd District.
- ↑ District 17 incumbent Matt Cartwright (D) filed for re-election in the new 8th District.
- ↑ Lamb was elected in a March 2018 special election to replace Rep. Tim Murphy (R).
- ↑ Lamb filed to run for PA-17 in the 2018 election.
- ↑ The number of districts available for analysis changes year-by-year.
- ↑ Before 1952 complete data are not available on every congressional district.
- ↑ The original data source did not have complete information due to the damage caused by Hurricane Sandy the month before the 2012 presidential election.
- ↑ Three congressional districts from Pennsylvania that were created in the 2018 redistricting are excluded from this figure.
