Daniel Biss secured the Democratic nomination for Illinois’s 9th Congressional District after winning a crowded March 2026 primary against several challengers, positioning him to succeed retiring longtime incumbent Jan Schakowsky in a district rated solid Democratic by multiple forecasters. The North Shore and northwest suburban area has consistently delivered large Democratic margins in recent cycles, giving Biss, the Evanston mayor and former state senator, a substantial structural edge over Republican nominee John Elleson, an Arlington Heights pastor who prevailed in a lower-turnout GOP primary. Trader consensus reflected in current pricing aligns with this baseline, as the district’s partisan composition and Biss’s local profile and fundraising have limited pathways for an upset. A late-breaking scandal, significant health development, or unanticipated national swing could still alter the outcome before November 3, though such shifts remain uncommon in this environment.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedIL-09 House Election Winner
IL-09 House Election Winner
$31,625 Vol.
$31,625 Vol.
Nov 2, 2026
Daniel Biss (D)
95%
John Elleson (R)
5%
$31,625 Vol.
$31,625 Vol.
Nov 2, 2026
Daniel Biss (D)
$17,371 Vol.
95%
John Elleson (R)
$14,254 Vol.
5%
This market will resolve according to the party of the candidate who wins the IL-09 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).Daniel Biss secured the Democratic nomination for Illinois’s 9th Congressional District after winning a crowded March 2026 primary against several challengers, positioning him to succeed retiring longtime incumbent Jan Schakowsky in a district rated solid Democratic by multiple forecasters. The North Shore and northwest suburban area has consistently delivered large Democratic margins in recent cycles, giving Biss, the Evanston mayor and former state senator, a substantial structural edge over Republican nominee John Elleson, an Arlington Heights pastor who prevailed in a lower-turnout GOP primary. Trader consensus reflected in current pricing aligns with this baseline, as the district’s partisan composition and Biss’s local profile and fundraising have limited pathways for an upset. A late-breaking scandal, significant health development, or unanticipated national swing could still alter the outcome before November 3, though such shifts remain uncommon in this environment.
This market will resolve according to the party of the candidate who wins the IL-09 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).
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
Volume
$31,625End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:09 AM ETResolver
0x2F5e3684c...This market will resolve according to the party of the candidate who wins the IL-09 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).Daniel Biss secured the Democratic nomination for Illinois’s 9th Congressional District after winning a crowded March 2026 primary against several challengers, positioning him to succeed retiring longtime incumbent Jan Schakowsky in a district rated solid Democratic by multiple forecasters. The North Shore and northwest suburban area has consistently delivered large Democratic margins in recent cycles, giving Biss, the Evanston mayor and former state senator, a substantial structural edge over Republican nominee John Elleson, an Arlington Heights pastor who prevailed in a lower-turnout GOP primary. Trader consensus reflected in current pricing aligns with this baseline, as the district’s partisan composition and Biss’s local profile and fundraising have limited pathways for an upset. A late-breaking scandal, significant health development, or unanticipated national swing could still alter the outcome before November 3, though such shifts remain uncommon in this environment.
This market will resolve according to the party of the candidate who wins the IL-09 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).
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/).
Volume
$31,625End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 11:09 AM ETResolver
0x2F5e3684c...Daniel Biss secured the Democratic nomination for Illinois’s 9th Congressional District after winning a crowded March 2026 primary against several challengers, positioning him to succeed retiring longtime incumbent Jan Schakowsky in a district rated solid Democratic by multiple forecasters. The North Shore and northwest suburban area has consistently delivered large Democratic margins in recent cycles, giving Biss, the Evanston mayor and former state senator, a substantial structural edge over Republican nominee John Elleson, an Arlington Heights pastor who prevailed in a lower-turnout GOP primary. Trader consensus reflected in current pricing aligns with this baseline, as the district’s partisan composition and Biss’s local profile and fundraising have limited pathways for an upset. A late-breaking scandal, significant health development, or unanticipated national swing could still alter the outcome before November 3, though such shifts remain uncommon in this environment.
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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