Incumbent Republican Mary Miller secured easy renomination in the March 17 Illinois primary with 73.5% of the vote, setting up a general election matchup against Democratic nominee Jennifer Todd, who prevailed in a fragmented primary at 45.7%. Trader consensus at 92.5% for Republicans reflects IL-15's strong Cook PVI of R+20—32nd most Republican nationally—evidenced by Trump's 69% district share in 2024 and Miller's prior landslides, including 99.5% unopposed in 2024 amid negligible Democratic opposition. Recent fundraising reports show Miller holding a wide edge over Todd. While commanding, odds could shift via a major Miller scandal, health event, or unprecedented Democratic turnout wave ahead of the November 3 contest.
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
$17,607 Vol.
$17,607 Vol.
Republican Party
93%
Democratic Party
7%
$17,607 Vol.
$17,607 Vol.
Republican Party
93%
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 secured easy renomination in the March 17 Illinois primary with 73.5% of the vote, setting up a general election matchup against Democratic nominee Jennifer Todd, who prevailed in a fragmented primary at 45.7%. Trader consensus at 92.5% for Republicans reflects IL-15's strong Cook PVI of R+20—32nd most Republican nationally—evidenced by Trump's 69% district share in 2024 and Miller's prior landslides, including 99.5% unopposed in 2024 amid negligible Democratic opposition. Recent fundraising reports show Miller holding a wide edge over Todd. While commanding, odds could shift via a major Miller scandal, health event, or unprecedented Democratic turnout wave ahead of the November 3 contest.
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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