The heavily Democratic lean of Texas's 18th congressional district, reinforced by its D+29 Cook Partisan Voting Index, underpins trader consensus that the Democratic nominee will prevail in the November 2026 general election. Christian Menefee secured the nomination after defeating longtime incumbent Al Green in the May 2026 Democratic primary runoff, a contest triggered by Republican-led redistricting that paired sitting members. Menefee's decisive primary victory and subsequent fundraising edge have further consolidated support. Republican challengers face structural barriers in this urban Houston-area seat, with limited polling or candidate visibility to date. Late developments such as a major scandal, health issue, or unexpected turnout shift remain the primary variables that could alter the outcome before Election Day.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedTX-18 House Election Winner
$12,751 Vol.
$12,751 Vol.
Democratic Party
97%
Republican Party
4%
$12,751 Vol.
$12,751 Vol.
Democratic Party
97%
Republican Party
4%
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: Dec 16, 2025, 1:13 PM 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 heavily Democratic lean of Texas's 18th congressional district, reinforced by its D+29 Cook Partisan Voting Index, underpins trader consensus that the Democratic nominee will prevail in the November 2026 general election. Christian Menefee secured the nomination after defeating longtime incumbent Al Green in the May 2026 Democratic primary runoff, a contest triggered by Republican-led redistricting that paired sitting members. Menefee's decisive primary victory and subsequent fundraising edge have further consolidated support. Republican challengers face structural barriers in this urban Houston-area seat, with limited polling or candidate visibility to date. Late developments such as a major scandal, health issue, or unexpected turnout shift remain the primary variables that could alter the outcome 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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