Washington’s 4th congressional district remains a solidly Republican seat with a Cook Partisan Voting Index of R+10 and consistent double-digit margins for Republican presidential candidates, including Trump’s 2024 performance. The August 4 top-two primary advanced Republican Amanda McKinney, a Yakima County commissioner with endorsements from Trump and House leadership, against Democrat John Duresky, a retired Air Force veteran. McKinney’s strong showing consolidated conservative support in the open-seat race following Dan Newhouse’s retirement, while the Democratic field lacked competition. Forecasters rate the November 3 general election as Solid or Safe Republican, reflecting the district’s voting patterns, limited crossover appeal for Democrats, and absence of recent polling shifts that would narrow the gap.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedWA-04 House Election Winner
$50,303 Vol.
$50,303 Vol.
Republican Party
90%
Democratic Party
8%
$50,303 Vol.
$50,303 Vol.
Republican Party
90%
Democratic Party
8%
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, 11:24 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...Washington’s 4th congressional district remains a solidly Republican seat with a Cook Partisan Voting Index of R+10 and consistent double-digit margins for Republican presidential candidates, including Trump’s 2024 performance. The August 4 top-two primary advanced Republican Amanda McKinney, a Yakima County commissioner with endorsements from Trump and House leadership, against Democrat John Duresky, a retired Air Force veteran. McKinney’s strong showing consolidated conservative support in the open-seat race following Dan Newhouse’s retirement, while the Democratic field lacked competition. Forecasters rate the November 3 general election as Solid or Safe Republican, reflecting the district’s voting patterns, limited crossover appeal for Democrats, and absence of recent polling shifts that would narrow the gap.
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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