Incumbent Republican Mary Miller's commanding lead in the IL-15 House race stems from the district's R+20 Cook Partisan Voting Index—ranking it among the nation's most Republican seats, where Donald Trump captured 69% in 2024—and her easy March 17 primary win with 73.5% against challengers. Facing Democrat Jennifer Todd, who narrowly advanced from a fragmented primary, Miller holds a massive fundraising edge with $833,000 cash-on-hand to Todd's $9,000 as of late March, per FEC filings. All major forecasters rate it Solid Republican, reflecting trader consensus on low upset risk ahead of the November 3 general election. Shifts could arise from a major scandal, health issue, or national wave, but historical incumbency in safe seats makes these improbable.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedIL-15 House Election Winner
IL-15 House Election Winner
$21,684 Vol.
$21,684 Vol.
Republican Party
94%
Democratic Party
7%
$21,684 Vol.
$21,684 Vol.
Republican Party
94%
Democratic Party
7%
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...Incumbent Republican Mary Miller's commanding lead in the IL-15 House race stems from the district's R+20 Cook Partisan Voting Index—ranking it among the nation's most Republican seats, where Donald Trump captured 69% in 2024—and her easy March 17 primary win with 73.5% against challengers. Facing Democrat Jennifer Todd, who narrowly advanced from a fragmented primary, Miller holds a massive fundraising edge with $833,000 cash-on-hand to Todd's $9,000 as of late March, per FEC filings. All major forecasters rate it Solid Republican, reflecting trader consensus on low upset risk ahead of the November 3 general election. Shifts could arise from a major scandal, health issue, or national wave, but historical incumbency in safe seats makes these improbable.
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