Incumbent Republican Rep. Mary Miller's easy March primary victory and the district's R+20 partisan tilt, where Donald Trump won 69% in 2024, anchor trader consensus at 93.5% for the Republican Party in the IL-15 House race. Democrat Jennifer Todd advanced from a crowded primary but trails significantly in fundraising, with Miller holding over $833,000 cash on hand as of late March compared to Todd's $9,000. Cook Political Report rates the seat Solid Republican, reflecting Miller's history of landslide wins, including 99.5% in her last general election. No polls show competitiveness, and no major developments have emerged in the past 30 days. A national Democratic wave, scandal, or health issue for Miller could shift odds, though structural barriers remain high ahead of the November 3 general election.
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
$21,525 Vol.
$21,525 Vol.
Republican Party
94%
Democratic Party
7%
$21,525 Vol.
$21,525 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 Rep. Mary Miller's easy March primary victory and the district's R+20 partisan tilt, where Donald Trump won 69% in 2024, anchor trader consensus at 93.5% for the Republican Party in the IL-15 House race. Democrat Jennifer Todd advanced from a crowded primary but trails significantly in fundraising, with Miller holding over $833,000 cash on hand as of late March compared to Todd's $9,000. Cook Political Report rates the seat Solid Republican, reflecting Miller's history of landslide wins, including 99.5% in her last general election. No polls show competitiveness, and no major developments have emerged in the past 30 days. A national Democratic wave, scandal, or health issue for Miller could shift odds, though structural barriers remain high ahead of the November 3 general election.
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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