Democratic incumbent Steven Horsford holds a strong position in Nevada’s 4th congressional district, a seat with a Cook Partisan Voter Index of D+2 that favored Kamala Harris by roughly two points in 2024. Horsford advanced unopposed through the June 2026 Democratic primary, while Cody Whipple secured the Republican nomination. Nonpartisan ratings from the Cook Political Report, Sabato’s Crystal Ball, and others classify the race as Likely Democratic. These factors, combined with the incumbent’s established fundraising and organizational edge, underpin the market’s implied probability favoring the Democratic Party at 87.5 percent over the Republican Party at 11 percent ahead of 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. · UpdatedNV-04 House Election Winner
Democratic Party
88%
Republican Party
11%
Democratic Party
88%
Republican Party
11%
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, 12:24 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...Democratic incumbent Steven Horsford holds a strong position in Nevada’s 4th congressional district, a seat with a Cook Partisan Voter Index of D+2 that favored Kamala Harris by roughly two points in 2024. Horsford advanced unopposed through the June 2026 Democratic primary, while Cody Whipple secured the Republican nomination. Nonpartisan ratings from the Cook Political Report, Sabato’s Crystal Ball, and others classify the race as Likely Democratic. These factors, combined with the incumbent’s established fundraising and organizational edge, underpin the market’s implied probability favoring the Democratic Party at 87.5 percent over the Republican Party at 11 percent ahead of 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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