Incumbent Democrat Val Hoyle commands trader consensus at 91% implied probability to win Oregon's 4th Congressional District, bolstered by Sabato's Crystal Ball upgrading the race to Safe Democratic on April 7 amid a D+6 Cook Partisan Voter Index. Hoyle prevailed 52%-44% over Republican Monique DeSpain in 2024 after similarly narrow victories in prior cycles, but national GOP reluctance to invest heavily—per Cook Political's Solid D rating—has solidified her position despite a rematch looming. Hoyle leads Democratic primary challengers Dan Bahlen and Melissa Bird in fundraising ahead of the May 19 primaries. Late-breaking scandals, a superior GOP nominee, or a national Republican midterm wave could challenge this outlook, though structural advantages favor continuation of Democratic control.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedOR-04 House Election Winner
OR-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 Val Hoyle commands trader consensus at 91% implied probability to win Oregon's 4th Congressional District, bolstered by Sabato's Crystal Ball upgrading the race to Safe Democratic on April 7 amid a D+6 Cook Partisan Voter Index. Hoyle prevailed 52%-44% over Republican Monique DeSpain in 2024 after similarly narrow victories in prior cycles, but national GOP reluctance to invest heavily—per Cook Political's Solid D rating—has solidified her position despite a rematch looming. Hoyle leads Democratic primary challengers Dan Bahlen and Melissa Bird in fundraising ahead of the May 19 primaries. Late-breaking scandals, a superior GOP nominee, or a national Republican midterm wave could challenge this outlook, though structural advantages favor continuation of Democratic control.
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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