Republican incumbent Mike Bost holds a commanding position in the Illinois 12th congressional district race due to the southern Illinois district's established Republican lean, his consistent strong electoral performance including a 74 percent margin in 2024, and the absence of competitive polling or major developments since primaries concluded in March. Trader consensus reflected in current odds aligns with the district's partisan voting index and Bost's fundraising and organizational edge over Democratic nominee Julie Fortier ahead of the November 3 general election. A late-breaking scandal, significant health event, or unusually strong national Democratic turnout wave could narrow the gap, though such shifts remain low-probability based on historical patterns in this solidly Republican seat.
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
$21,481 Vol.
$21,481 Vol.
Republican Party
94%
Democratic Party
4%
$21,481 Vol.
$21,481 Vol.
Republican Party
94%
Democratic Party
4%
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
Resolver
0x2F5e3684c...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/).
Resolver
0x2F5e3684c...Republican incumbent Mike Bost holds a commanding position in the Illinois 12th congressional district race due to the southern Illinois district's established Republican lean, his consistent strong electoral performance including a 74 percent margin in 2024, and the absence of competitive polling or major developments since primaries concluded in March. Trader consensus reflected in current odds aligns with the district's partisan voting index and Bost's fundraising and organizational edge over Democratic nominee Julie Fortier ahead of the November 3 general election. A late-breaking scandal, significant health event, or unusually strong national Democratic turnout wave could narrow the gap, though such shifts remain low-probability based on historical patterns in this solidly Republican seat.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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