Incumbent Democrat Jonathan Jackson holds a commanding position in the Illinois 1st congressional district race due to the seat’s consistent Democratic lean, reflected in Kamala Harris’s 25.5-point margin there in 2024 and Jackson’s prior strong performances. All major forecasters rate the contest Solid or Safe Democratic. Jackson secured the Democratic nomination without significant opposition in the March 2026 primary, while Republican Christian Maxwell emerged from a low-turnout contest to face him in November. The district’s partisan composition and incumbency advantage underpin the 98.2% implied probability for Democrats in current trader consensus. Late developments such as a major scandal, health event affecting Jackson, or an unprecedented national Republican surge could still alter the outcome before election day.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedIL-01 House Election Winner
$54,352 Vol.
$54,352 Vol.
Democratic Party
98%
Republican Party
2%
$54,352 Vol.
$54,352 Vol.
Democratic Party
98%
Republican Party
2%
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, 11:08 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...Incumbent Democrat Jonathan Jackson holds a commanding position in the Illinois 1st congressional district race due to the seat’s consistent Democratic lean, reflected in Kamala Harris’s 25.5-point margin there in 2024 and Jackson’s prior strong performances. All major forecasters rate the contest Solid or Safe Democratic. Jackson secured the Democratic nomination without significant opposition in the March 2026 primary, while Republican Christian Maxwell emerged from a low-turnout contest to face him in November. The district’s partisan composition and incumbency advantage underpin the 98.2% implied probability for Democrats in current trader consensus. Late developments such as a major scandal, health event affecting Jackson, or an unprecedented national Republican surge could still alter the outcome before election day.
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