Rosa DeLauro, the longtime Democratic incumbent since 1991, faces Republican Christopher Lancia in Connecticut’s 3rd congressional district on November 3, 2026. The district’s strong Democratic lean, reflected in its partisan voting index and consistent election margins, underpins trader consensus that heavily favors the Democratic nominee. DeLauro advanced unopposed after the August 2026 Democratic primary was canceled, while Lancia secured the Republican nomination without opposition. Cook Political Report rates the seat Solid Democratic, consistent with historical results in this south-central Connecticut area including New Haven. A commanding lead in implied probability stems from structural advantages like incumbency, fundraising, and voter registration patterns. Potential shifts could arise from unforeseen events such as a major scandal, significant health developments affecting the incumbent, or an unusually strong national Republican midterm environment capable of narrowing the typical margin.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedCT-03 House Election Winner
$17,248 Vol.
$17,248 Vol.
Democratic Party
95%
Republican Party
6%
$17,248 Vol.
$17,248 Vol.
Democratic Party
95%
Republican Party
6%
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, 10:30 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...Rosa DeLauro, the longtime Democratic incumbent since 1991, faces Republican Christopher Lancia in Connecticut’s 3rd congressional district on November 3, 2026. The district’s strong Democratic lean, reflected in its partisan voting index and consistent election margins, underpins trader consensus that heavily favors the Democratic nominee. DeLauro advanced unopposed after the August 2026 Democratic primary was canceled, while Lancia secured the Republican nomination without opposition. Cook Political Report rates the seat Solid Democratic, consistent with historical results in this south-central Connecticut area including New Haven. A commanding lead in implied probability stems from structural advantages like incumbency, fundraising, and voter registration patterns. Potential shifts could arise from unforeseen events such as a major scandal, significant health developments affecting the incumbent, or an unusually strong national Republican midterm environment capable of narrowing the typical margin.
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