The Republican Party holds an 80% implied probability on Polymarket for the TX-21 House seat due to the district's Solid Republican rating from Cook Political Report, reflecting its strong partisan lean in the Texas Hill Country, north San Antonio, and Austin suburbs. Incumbent Chip Roy vacated the seat to pursue the Texas attorney general nomination, prompting a crowded GOP primary won decisively on March 3, 2026, by former MLB star Mark Teixeira, backed by President Trump's endorsement and Club for Growth support. Democrat Kristin Hook advanced in her uncontested primary, but lacks comparable resources or name recognition in this reliably red battleground. With no recent polls shifting sentiment and the general election set for November 3, traders see limited paths for a Democratic upset absent national trends or scandals.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedTX-21 House Election Winner
TX-21 House Election Winner
$30,349 Vol.
$30,349 Vol.
Republican Party
80%
Democratic Party
16%
$30,349 Vol.
$30,349 Vol.
Republican Party
80%
Democratic Party
16%
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...The Republican Party holds an 80% implied probability on Polymarket for the TX-21 House seat due to the district's Solid Republican rating from Cook Political Report, reflecting its strong partisan lean in the Texas Hill Country, north San Antonio, and Austin suburbs. Incumbent Chip Roy vacated the seat to pursue the Texas attorney general nomination, prompting a crowded GOP primary won decisively on March 3, 2026, by former MLB star Mark Teixeira, backed by President Trump's endorsement and Club for Growth support. Democrat Kristin Hook advanced in her uncontested primary, but lacks comparable resources or name recognition in this reliably red battleground. With no recent polls shifting sentiment and the general election set for November 3, traders see limited paths for a Democratic upset absent national trends or scandals.
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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