Incumbent Jim Costa holds a commanding lead in the California 21st congressional district race, reflecting his long tenure, substantial fundraising edge of roughly $1.3 million compared to challenger Kyle Kirkland’s $339,000, and the district’s recent Democratic lean in presidential and House voting. The June 2026 top-two primary confirmed Costa and Kirkland as the general election nominees, with nonpartisan ratings from outlets such as the Cook Political Report classifying the contest as Likely Democratic. Limited polling and the absence of major late-cycle disruptions have reinforced trader consensus around Costa’s reelection prospects ahead of the November 3 vote. Potential shifts could arise from unusually low Democratic turnout, a national partisan wave favoring Republicans, or unforeseen developments affecting either candidate before Election Day.
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
$27,447 Vol.
$27,447 Vol.
Nov 3, 2026
Jim Costa (D)
94%
Kyle Kirkland (R)
7%
$27,447 Vol.
$27,447 Vol.
Nov 3, 2026
Jim Costa (D)
$15,163 Vol.
94%
Kyle Kirkland (R)
$12,284 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 the California 21st congressional district race, reflecting his long tenure, substantial fundraising edge of roughly $1.3 million compared to challenger Kyle Kirkland’s $339,000, and the district’s recent Democratic lean in presidential and House voting. The June 2026 top-two primary confirmed Costa and Kirkland as the general election nominees, with nonpartisan ratings from outlets such as the Cook Political Report classifying the contest as Likely Democratic. Limited polling and the absence of major late-cycle disruptions have reinforced trader consensus around Costa’s reelection prospects ahead of the November 3 vote. Potential shifts could arise from unusually low Democratic turnout, a national partisan wave favoring Republicans, or unforeseen developments affecting either candidate before Election Day.
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
$27,447End Date
Nov 4, 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 the California 21st congressional district race, reflecting his long tenure, substantial fundraising edge of roughly $1.3 million compared to challenger Kyle Kirkland’s $339,000, and the district’s recent Democratic lean in presidential and House voting. The June 2026 top-two primary confirmed Costa and Kirkland as the general election nominees, with nonpartisan ratings from outlets such as the Cook Political Report classifying the contest as Likely Democratic. Limited polling and the absence of major late-cycle disruptions have reinforced trader consensus around Costa’s reelection prospects ahead of the November 3 vote. Potential shifts could arise from unusually low Democratic turnout, a national partisan wave favoring Republicans, or unforeseen developments affecting either candidate before Election Day.
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
$27,447End Date
Nov 4, 2026Market Opened
Jan 28, 2026, 12:08 AM ETResolver
0x2f5e3684c...Incumbent Jim Costa holds a commanding lead in the California 21st congressional district race, reflecting his long tenure, substantial fundraising edge of roughly $1.3 million compared to challenger Kyle Kirkland’s $339,000, and the district’s recent Democratic lean in presidential and House voting. The June 2026 top-two primary confirmed Costa and Kirkland as the general election nominees, with nonpartisan ratings from outlets such as the Cook Political Report classifying the contest as Likely Democratic. Limited polling and the absence of major late-cycle disruptions have reinforced trader consensus around Costa’s reelection prospects ahead of the November 3 vote. Potential shifts could arise from unusually low Democratic turnout, a national partisan wave favoring Republicans, or unforeseen developments affecting either candidate before Election Day.
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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