Incumbent Democrat Marie Gluesenkamp Perez advanced from Washington's August 4, 2026, top-two primary alongside Republican state Sen. John Braun to contest the November general election in the state's most competitive House district. The R+2 Cook PVI seat backed Trump in 2024 yet shows a modest leftward shift, with Perez securing reelection in both 2022 and 2024 by narrow margins. Recent Emerson polling placed the candidates nearly tied, while forecasters rate the race toss-up to lean Democratic, citing Perez's incumbency advantages, name recognition, and stronger combined Democratic primary performance. Trader consensus pricing reflects these structural factors and limited Republican momentum despite Braun's Trump endorsement, though the narrow polling and district fundamentals leave room for late shifts in turnout or campaign developments before Election Day.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedWA-03 House Election Winner
$33,202 Vol.
$33,202 Vol.
Democratic Party
86%
Republican Party
13%
$33,202 Vol.
$33,202 Vol.
Democratic Party
86%
Republican Party
13%
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: Dec 16, 2025, 1:15 PM 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 Marie Gluesenkamp Perez advanced from Washington's August 4, 2026, top-two primary alongside Republican state Sen. John Braun to contest the November general election in the state's most competitive House district. The R+2 Cook PVI seat backed Trump in 2024 yet shows a modest leftward shift, with Perez securing reelection in both 2022 and 2024 by narrow margins. Recent Emerson polling placed the candidates nearly tied, while forecasters rate the race toss-up to lean Democratic, citing Perez's incumbency advantages, name recognition, and stronger combined Democratic primary performance. Trader consensus pricing reflects these structural factors and limited Republican momentum despite Braun's Trump endorsement, though the narrow polling and district fundamentals leave room for late shifts in turnout or campaign developments before Election Day.
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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