Illinois' 12th Congressional District election, 2024
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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 |
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 |
1st • 2nd • 3rd • 4th • 5th • 6th • 7th • 8th • 9th • 10th • 11th • 12th • 13th • 14th • 15th • 16th • 17th 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:
- Illinois' 12th Congressional District election, 2024 (March 19 Democratic primary)
- Illinois' 12th Congressional District election, 2024 (March 19 Republican primary)
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 | ||
✔ | ![]() | Mike Bost (R) | 74.2 | 272,754 |
![]() | Brian Roberts (D) | 25.8 | 94,875 |
Total votes: 367,629 | ||||
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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 | ||
✔ | ![]() | Brian Roberts | 60.1 | 10,775 |
![]() | Preston Nelson | 39.9 | 7,151 |
Total votes: 17,926 | ||||
![]() | ||||
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Withdrawn or disqualified candidates
- Joshua Qualls (D)
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 | ||
✔ | ![]() | Mike Bost | 51.4 | 48,770 |
![]() | Darren Bailey | 48.6 | 46,035 |
Total votes: 94,805 | ||||
![]() | ||||
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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.
Party: Republican Party
Incumbent: Yes
Political Office:
- Illinois House of Representatives - District 115 (1995-2015)
- U.S. House of Representatives - Illinois 12th (Assumed office: 2015)
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.
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
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 |
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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." |
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 | |||||||||
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Race tracker | Race ratings | ||||||||
November 5, 2024 | October 29, 2024 | October 22, 2024 | October 15, 2024 | ||||||
The Cook Political Report with Amy Walter | Solid Republican | Solid Republican | Solid Republican | Solid Republican | |||||
Decision Desk HQ and The Hill | Safe Republican | Safe Republican | Safe Republican | Safe Republican | |||||
Inside Elections with Nathan L. Gonzales | Solid Republican | Solid Republican | Solid Republican | Solid Republican | |||||
Larry J. Sabato's Crystal Ball | Safe Republican | Safe Republican | Safe Republican | Safe 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 | ||||||
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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.

This section contains data on U.S. House primary election competitiveness in Illinois.
Illinois U.S. House competitiveness, 2014-2024 | ||||||||||||||
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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
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 ![]() |
Donald Trump ![]() | |||
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 | ||||
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Democratic Baseline ![]() |
Republican Baseline ![]() |
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 |
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 | |
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Office | Officeholder |
Governor | ![]() |
Lieutenant Governor | ![]() |
Secretary of State | ![]() |
Attorney General | ![]() |
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
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 | ||
✔ | ![]() | Mike Bost (R) | 75.0 | 218,379 |
![]() | Homer Markel (D) ![]() | 25.0 | 72,791 | |
Other/Write-in votes | 0.0 | 1 |
Total votes: 291,171 | ||||
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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 | ||
✔ | ![]() | Homer Markel ![]() | 56.7 | 11,068 |
![]() | Joshua Qualls | 43.3 | 8,438 |
Total votes: 19,506 | ||||
![]() | ||||
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Withdrawn or disqualified candidates
- Keith Richardson (D)
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 | ||
✔ | ![]() | Mike Bost | 100.0 | 88,681 |
Total votes: 88,681 | ||||
![]() | ||||
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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.
Total votes: 322,416 | ||||
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Withdrawn or disqualified candidates
- Brian Boeving (Federalist Party)
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.
Total votes: 53,663 | ||||
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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 | ||
✔ | ![]() | Mike Bost | 100.0 | 40,222 |
Total votes: 40,222 | ||||
![]() | ||||
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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 | ||
✔ | ![]() | Mike Bost (R) | 51.6 | 134,884 |
![]() | Brendan Kelly (D) | 45.4 | 118,724 | |
![]() | Randy Auxier (G) | 3.0 | 7,935 |
Total votes: 261,543 (100.00% precincts reporting) | ||||
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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 | ||
✔ | ![]() | Brendan Kelly | 81.0 | 40,555 |
![]() | David Bequette | 19.0 | 9,526 |
Total votes: 50,081 | ||||
![]() | ||||
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Withdrawn or disqualified candidates
- Charles Koen (D)
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 | ||
✔ | ![]() | Mike Bost | 83.5 | 31,658 |
![]() | Preston Nelson | 16.5 | 6,258 |
Total votes: 37,916 | ||||
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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 | ||
✔ | ![]() | Randy Auxier | 100.0 | 131 |
Total votes: 131 | ||||
![]() | ||||
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See also
External links
Footnotes
- ↑ A majority in the U.S. House when there are no vacancies is 218 seats.
- ↑ These figures include the seat of Rep. Matt Gaetz (R-Fla.), who resigned on Nov. 13, 2024, after winning re-election.
- ↑ Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
- ↑ Inside Elections also uses Tilt ratings to indicate an even smaller advantage and greater competitiveness.
- ↑ Amee LaTour, "Email correspondence with Nathan Gonzalez," April 19, 2018
- ↑ Amee LaTour, "Email correspondence with Kyle Kondik," April 19, 2018
- ↑ Amee LaTour, "Email correspondence with Charlie Cook," April 22, 2018
- ↑ Average of all congressional districts.
- ↑ Average of all congressional districts.
- ↑ Average of all congressional districts.
- ↑ Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed January 10, 2024
- ↑ Inside Elections, "Methodology: Inside Elections’ Baseline by Congressional District," December 8, 2023