Republican incumbent Roger Williams faces Democratic nominee Dione Sims in Texas’s 25th congressional district on November 3, 2026. Redistricting completed in August 2025 produced an R+11 Cook Partisan Voter Index, moderating the prior R+19 lean while preserving a clear Republican advantage rooted in suburban and rural voting patterns. Williams secured the GOP nomination without primary opposition and chairs the House Small Business Committee, bolstering institutional support and fundraising. Sims emerged from the Democratic primary but faces structural headwinds in a district where Republicans have held the seat since 2013. Forecasters rate the contest Solid or Lean Republican, aligning with the 88.5 percent trader consensus on a GOP outcome. No late-cycle developments have altered the district’s partisan baseline or introduced credible threats to the incumbent’s position.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedTX-25 House Election Winner
Republican Party
89%
Democratic Party
12%
Republican Party
89%
Democratic Party
12%
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...Republican incumbent Roger Williams faces Democratic nominee Dione Sims in Texas’s 25th congressional district on November 3, 2026. Redistricting completed in August 2025 produced an R+11 Cook Partisan Voter Index, moderating the prior R+19 lean while preserving a clear Republican advantage rooted in suburban and rural voting patterns. Williams secured the GOP nomination without primary opposition and chairs the House Small Business Committee, bolstering institutional support and fundraising. Sims emerged from the Democratic primary but faces structural headwinds in a district where Republicans have held the seat since 2013. Forecasters rate the contest Solid or Lean Republican, aligning with the 88.5 percent trader consensus on a GOP outcome. No late-cycle developments have altered the district’s partisan baseline or introduced credible threats to the incumbent’s position.
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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