Incumbent Jim Costa holds a commanding lead in trader consensus for the CA-21 general election due to his long tenure representing the Central Valley district, consistent fundraising advantage over Republican Kyle Kirkland, and the seat’s underlying Democratic lean. Costa advanced from the June 2026 top-two primary with roughly 42% of the vote to Kirkland’s 26%, while nonpartisan ratings from outlets such as the Cook Political Report classify the race as Likely Democratic. Kirkland, a Fresno casino owner making his second congressional bid, has not closed the gap despite emphasizing cost-of-living issues. The general election is scheduled for November 3. Late developments such as a major scandal, health event, or sharp national partisan swing could still alter the outcome, though current evidence shows limited volatility in the race.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedCA-21 House Election Winner
CA-21 House Election Winner
$27,144 Vol.
$27,144 Vol.
Nov 2, 2026
Jim Costa (D)
93%
Kyle Kirkland (R)
7%
$27,144 Vol.
$27,144 Vol.
Nov 2, 2026
Jim Costa (D)
$14,977 Vol.
93%
Kyle Kirkland (R)
$12,168 Vol.
7%
This market will resolve according to the party of the candidate who wins the CA-21 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).Incumbent Jim Costa holds a commanding lead in trader consensus for the CA-21 general election due to his long tenure representing the Central Valley district, consistent fundraising advantage over Republican Kyle Kirkland, and the seat’s underlying Democratic lean. Costa advanced from the June 2026 top-two primary with roughly 42% of the vote to Kirkland’s 26%, while nonpartisan ratings from outlets such as the Cook Political Report classify the race as Likely Democratic. Kirkland, a Fresno casino owner making his second congressional bid, has not closed the gap despite emphasizing cost-of-living issues. The general election is scheduled for November 3. Late developments such as a major scandal, health event, or sharp national partisan swing could still alter the outcome, though current evidence shows limited volatility in the race.
This market will resolve according to the party of the candidate who wins the CA-21 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).
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, 12:08 AM ET
Volume
$27,144End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 12:08 AM ETResolver
0x2F5e3684c...This market will resolve according to the party of the candidate who wins the CA-21 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).Incumbent Jim Costa holds a commanding lead in trader consensus for the CA-21 general election due to his long tenure representing the Central Valley district, consistent fundraising advantage over Republican Kyle Kirkland, and the seat’s underlying Democratic lean. Costa advanced from the June 2026 top-two primary with roughly 42% of the vote to Kirkland’s 26%, while nonpartisan ratings from outlets such as the Cook Political Report classify the race as Likely Democratic. Kirkland, a Fresno casino owner making his second congressional bid, has not closed the gap despite emphasizing cost-of-living issues. The general election is scheduled for November 3. Late developments such as a major scandal, health event, or sharp national partisan swing could still alter the outcome, though current evidence shows limited volatility in the race.
This market will resolve according to the party of the candidate who wins the CA-21 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026.
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/).
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/).
Volume
$27,144End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 12:08 AM ETResolver
0x2F5e3684c...Incumbent Jim Costa holds a commanding lead in trader consensus for the CA-21 general election due to his long tenure representing the Central Valley district, consistent fundraising advantage over Republican Kyle Kirkland, and the seat’s underlying Democratic lean. Costa advanced from the June 2026 top-two primary with roughly 42% of the vote to Kirkland’s 26%, while nonpartisan ratings from outlets such as the Cook Political Report classify the race as Likely Democratic. Kirkland, a Fresno casino owner making his second congressional bid, has not closed the gap despite emphasizing cost-of-living issues. The general election is scheduled for November 3. Late developments such as a major scandal, health event, or sharp national partisan swing could still alter the outcome, though current evidence shows limited volatility in the race.
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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