Incumbent Republican Dan Newhouse's dominant August primary victory, capturing 63% in Washington's safely red 4th Congressional District (PVI R+22), anchors trader consensus at 85.5% for a GOP hold. Democrat Jerrod Sessler advanced with just 13% in the top-two primary, underscoring weak Democratic positioning in this Trump-won-by-33-point area. Nonpartisan forecasters like Cook Political Report and Sabato's Crystal Ball unanimously rate the race Solid Republican, with no recent polls, scandals, or campaign shifts altering fundamentals ahead of the November 5 general election. Markets reflect this structural edge, pricing minimal upset risk despite national headwinds.
Experimental AI-generated summary referencing Polymarket data · UpdatedWA-04 House Election Winner
WA-04 House Election Winner
Republican Party
86%
Democratic Party
13%
Republican Party
86%
Democratic 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: Jan 28, 2026, 11:24 AM ET
Resolver
0x2F5e3684c...Resolver
0x2F5e3684c...Incumbent Republican Dan Newhouse's dominant August primary victory, capturing 63% in Washington's safely red 4th Congressional District (PVI R+22), anchors trader consensus at 85.5% for a GOP hold. Democrat Jerrod Sessler advanced with just 13% in the top-two primary, underscoring weak Democratic positioning in this Trump-won-by-33-point area. Nonpartisan forecasters like Cook Political Report and Sabato's Crystal Ball unanimously rate the race Solid Republican, with no recent polls, scandals, or campaign shifts altering fundamentals ahead of the November 5 general election. Markets reflect this structural edge, pricing minimal upset risk despite national headwinds.
Experimental AI-generated summary referencing Polymarket data · Updated

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