The Republican nominee holds a clear edge in NY-21 trader pricing due to the district’s consistent right-leaning partisan profile and history of Republican control, factors that have kept implied probabilities for the GOP above 70 percent. Anthony Constantino secured the Republican nomination in the June primary with Trump endorsement, while Democrat Blake Gendebien prevailed on his side; the open seat created by Elise Stefanik’s retirement has produced mixed August polling, with one survey showing Constantino ahead by double digits and another giving Gendebien a narrow lead. Race ratings from Cook, Sabato’s Crystal Ball, and Inside Elections classify the contest as Solid or Safe Republican, aligning with the current market consensus ahead of the November 3 general election.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedNY-21 House Election Winner
$62,325 Vol.
$62,325 Vol.
Republican Party
71%
Democratic Party
28%
$62,325 Vol.
$62,325 Vol.
Republican Party
71%
Democratic Party
28%
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, 11:23 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...The Republican nominee holds a clear edge in NY-21 trader pricing due to the district’s consistent right-leaning partisan profile and history of Republican control, factors that have kept implied probabilities for the GOP above 70 percent. Anthony Constantino secured the Republican nomination in the June primary with Trump endorsement, while Democrat Blake Gendebien prevailed on his side; the open seat created by Elise Stefanik’s retirement has produced mixed August polling, with one survey showing Constantino ahead by double digits and another giving Gendebien a narrow lead. Race ratings from Cook, Sabato’s Crystal Ball, and Inside Elections classify the contest as Solid or Safe Republican, aligning with the current market consensus ahead of the November 3 general election.
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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