Incumbent Republican Mike Bost secured unopposed nomination in the March 2026 primary for Illinois’s 12th congressional district, facing Democrat Julie Fortier in the November general election. The district’s R+22 Partisan Voter Index, rooted in consistent Republican performance in recent presidential cycles, underpins forecaster consensus from the Cook Political Report, Sabato’s Crystal Ball, and others rating the seat Solid or Safe Republican. Bost’s long tenure since 2015 and the absence of primary or general-election challengers with meaningful fundraising or name recognition have reinforced trader expectations. A shift would require an unusually large national swing, major scandal, or health-related withdrawal, none of which appear imminent based on current filings and district fundamentals.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedIL-12 House Election Winner
IL-12 House Election Winner
$24,685 Vol.
$24,685 Vol.
Nov 2, 2026
Republican Party
98%
Democratic Party
3%
$24,685 Vol.
$24,685 Vol.
Nov 2, 2026
Republican Party
$13,573 Vol.
98%
Democratic Party
$11,112 Vol.
3%
This market will resolve according to the party of the candidate who wins the IL-12 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).Incumbent Republican Mike Bost secured unopposed nomination in the March 2026 primary for Illinois’s 12th congressional district, facing Democrat Julie Fortier in the November general election. The district’s R+22 Partisan Voter Index, rooted in consistent Republican performance in recent presidential cycles, underpins forecaster consensus from the Cook Political Report, Sabato’s Crystal Ball, and others rating the seat Solid or Safe Republican. Bost’s long tenure since 2015 and the absence of primary or general-election challengers with meaningful fundraising or name recognition have reinforced trader expectations. A shift would require an unusually large national swing, major scandal, or health-related withdrawal, none of which appear imminent based on current filings and district fundamentals.
This market will resolve according to the party of the candidate who wins the IL-12 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Market Opened: Jan 28, 2026, 11:09 AM ET
Volume
$24,685End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:09 AM ETResolver
0x2F5e3684c...This market will resolve according to the party of the candidate who wins the IL-12 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).Incumbent Republican Mike Bost secured unopposed nomination in the March 2026 primary for Illinois’s 12th congressional district, facing Democrat Julie Fortier in the November general election. The district’s R+22 Partisan Voter Index, rooted in consistent Republican performance in recent presidential cycles, underpins forecaster consensus from the Cook Political Report, Sabato’s Crystal Ball, and others rating the seat Solid or Safe Republican. Bost’s long tenure since 2015 and the absence of primary or general-election challengers with meaningful fundraising or name recognition have reinforced trader expectations. A shift would require an unusually large national swing, major scandal, or health-related withdrawal, none of which appear imminent based on current filings and district fundamentals.
This market will resolve according to the party of the candidate who wins the IL-12 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Volume
$24,685End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:09 AM ETResolver
0x2F5e3684c...Incumbent Republican Mike Bost secured unopposed nomination in the March 2026 primary for Illinois’s 12th congressional district, facing Democrat Julie Fortier in the November general election. The district’s R+22 Partisan Voter Index, rooted in consistent Republican performance in recent presidential cycles, underpins forecaster consensus from the Cook Political Report, Sabato’s Crystal Ball, and others rating the seat Solid or Safe Republican. Bost’s long tenure since 2015 and the absence of primary or general-election challengers with meaningful fundraising or name recognition have reinforced trader expectations. A shift would require an unusually large national swing, major scandal, or health-related withdrawal, none of which appear imminent based on current filings and district fundamentals.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions