Illinois's 1st congressional district maintains a strong Democratic tilt, reflected in its D+18 Partisan Voter Index and consistent double-digit margins in recent cycles, including a 25-point presidential edge in 2024. Incumbent Democrat Jonathan Jackson secured the nomination unopposed in the March 2026 primary and faces Republican Christian Maxwell, who prevailed in his primary, in the November general election. Forecasters across outlets rate the contest Solid or Safe Democratic, citing the district's South Side Chicago base and suburban areas alongside limited Republican infrastructure. Trader consensus aligns with these fundamentals. A late-breaking scandal involving Jackson, significant health developments, or an unprecedented national Republican surge could narrow the gap, though historical patterns indicate substantial barriers to an upset.
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
$54,342 Vol.
$54,342 Vol.
Democratic Party
98%
Republican Party
2%
$54,342 Vol.
$54,342 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...Illinois's 1st congressional district maintains a strong Democratic tilt, reflected in its D+18 Partisan Voter Index and consistent double-digit margins in recent cycles, including a 25-point presidential edge in 2024. Incumbent Democrat Jonathan Jackson secured the nomination unopposed in the March 2026 primary and faces Republican Christian Maxwell, who prevailed in his primary, in the November general election. Forecasters across outlets rate the contest Solid or Safe Democratic, citing the district's South Side Chicago base and suburban areas alongside limited Republican infrastructure. Trader consensus aligns with these fundamentals. A late-breaking scandal involving Jackson, significant health developments, or an unprecedented national Republican surge could narrow the gap, though historical patterns indicate substantial barriers to an upset.
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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