Incumbent Democrat Madeleine Dean's commanding position in Pennsylvania's 4th Congressional District drives trader consensus at 91% for a Democratic hold, reflecting the seat's Solid Democratic rating from Cook Political Report and a D+8 partisan lean. Dean, who won reelection in 2024 with a comfortable margin over Republican David Winkler, faces no Democratic primary challengers ahead of the May 19 contest, signaling party unity and low internal risk. No major Republican contender has emerged, underscoring historical base rates of incumbent retention in safe districts. Upsets would require a high-profile GOP recruit, a Dean scandal, or a national Republican wave, though structural advantages make such shifts unlikely before 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. · UpdatedPA-04 House Election Winner
PA-04 House Election Winner
Democratic Party
91%
Republican Party
9%
Democratic Party
91%
Republican Party
9%
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, 11:23 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 Democrat Madeleine Dean's commanding position in Pennsylvania's 4th Congressional District drives trader consensus at 91% for a Democratic hold, reflecting the seat's Solid Democratic rating from Cook Political Report and a D+8 partisan lean. Dean, who won reelection in 2024 with a comfortable margin over Republican David Winkler, faces no Democratic primary challengers ahead of the May 19 contest, signaling party unity and low internal risk. No major Republican contender has emerged, underscoring historical base rates of incumbent retention in safe districts. Upsets would require a high-profile GOP recruit, a Dean scandal, or a national Republican wave, though structural advantages make such shifts unlikely before 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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