California's 18th congressional district maintains a strong Democratic partisan lean, reflected in its Cook Partisan Voting Index and the incumbent Zoe Lofgren's consistent general election margins exceeding 30 points in prior cycles. Lofgren advanced from the June 2026 top-two primary with a clear majority, facing Republican Shane Lewis in the November general election. No major polling shifts, candidate withdrawals, or district-altering events have emerged since the primary to alter the competitive landscape. Trader consensus at 96% for a Democratic outcome aligns with historical base rates for solidly Democratic seats. Late developments such as a significant scandal, health-related withdrawal by the incumbent, or an unprecedented national partisan swing could theoretically narrow the margin, though such factors remain rare in this district.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedCA-18 House Election Winner
CA-18 House Election Winner
$39,788 Vol.
$39,788 Vol.
Nov 3, 2026
Democratic Party
96%
Republican Party
3%
$39,788 Vol.
$39,788 Vol.
Nov 3, 2026
Democratic Party
$20,583 Vol.
96%
Republican Party
$19,206 Vol.
3%
This market will resolve according to the party of the candidate who wins the CA-18 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/).California's 18th congressional district maintains a strong Democratic partisan lean, reflected in its Cook Partisan Voting Index and the incumbent Zoe Lofgren's consistent general election margins exceeding 30 points in prior cycles. Lofgren advanced from the June 2026 top-two primary with a clear majority, facing Republican Shane Lewis in the November general election. No major polling shifts, candidate withdrawals, or district-altering events have emerged since the primary to alter the competitive landscape. Trader consensus at 96% for a Democratic outcome aligns with historical base rates for solidly Democratic seats. Late developments such as a significant scandal, health-related withdrawal by the incumbent, or an unprecedented national partisan swing could theoretically narrow the margin, though such factors remain rare in this district.
This market will resolve according to the party of the candidate who wins the CA-18 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
$39,788End 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-18 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/).California's 18th congressional district maintains a strong Democratic partisan lean, reflected in its Cook Partisan Voting Index and the incumbent Zoe Lofgren's consistent general election margins exceeding 30 points in prior cycles. Lofgren advanced from the June 2026 top-two primary with a clear majority, facing Republican Shane Lewis in the November general election. No major polling shifts, candidate withdrawals, or district-altering events have emerged since the primary to alter the competitive landscape. Trader consensus at 96% for a Democratic outcome aligns with historical base rates for solidly Democratic seats. Late developments such as a significant scandal, health-related withdrawal by the incumbent, or an unprecedented national partisan swing could theoretically narrow the margin, though such factors remain rare in this district.
This market will resolve according to the party of the candidate who wins the CA-18 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
$39,788End Date
Nov 3, 2026Market Opened
Jan 28, 2026, 12:08 AM ETResolver
0x2F5e3684c...California's 18th congressional district maintains a strong Democratic partisan lean, reflected in its Cook Partisan Voting Index and the incumbent Zoe Lofgren's consistent general election margins exceeding 30 points in prior cycles. Lofgren advanced from the June 2026 top-two primary with a clear majority, facing Republican Shane Lewis in the November general election. No major polling shifts, candidate withdrawals, or district-altering events have emerged since the primary to alter the competitive landscape. Trader consensus at 96% for a Democratic outcome aligns with historical base rates for solidly Democratic seats. Late developments such as a significant scandal, health-related withdrawal by the incumbent, or an unprecedented national partisan swing could theoretically narrow the margin, though such factors remain rare in this district.
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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