Democratic incumbent Jim Costa advanced from the June 2, 2026 primary with 42.2% of the vote, ahead of Republican Kyle Kirkland at 26.4%, setting up a general election matchup on November 3. Nonpartisan forecasters including the Cook Political Report, Inside Elections, and Sabato’s Crystal Ball rate CA-21 as Likely Democratic, reflecting the district’s Central Valley demographics, post-redistricting boundaries, and Costa’s long incumbency advantage. Trader consensus at 87.5% for Democrats aligns with these assessments and historical performance in the seat, though the general election remains months away and subject to shifts from national conditions or turnout patterns.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · AtualizadoVencedor da eleição para a Casa do CA-21
$16,328 Vol.
$16,328 Vol.
Partido Democrata
91%
Partido Republicano
9%
$16,328 Vol.
$16,328 Vol.
Partido Democrata
91%
Partido Republicano
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/).
Mercado Aberto: Jan 28, 2026, 12:08 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...Democratic incumbent Jim Costa advanced from the June 2, 2026 primary with 42.2% of the vote, ahead of Republican Kyle Kirkland at 26.4%, setting up a general election matchup on November 3. Nonpartisan forecasters including the Cook Political Report, Inside Elections, and Sabato’s Crystal Ball rate CA-21 as Likely Democratic, reflecting the district’s Central Valley demographics, post-redistricting boundaries, and Costa’s long incumbency advantage. Trader consensus at 87.5% for Democrats aligns with these assessments and historical performance in the seat, though the general election remains months away and subject to shifts from national conditions or turnout patterns.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · Atualizado

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