Incumbent Democrat Jeanne Shaheen's retirement has opened New Hampshire's Senate seat, with Rep. Chris Pappas dominating the Democratic primary at 61% in the latest University of New Hampshire survey of April 17-21. Pappas leads likely Republican nominee John Sununu 49%-42% and Scott Brown 52%-38% in head-to-head general election matchups from the same poll, shifting trader consensus toward Democrats after Emerson's March tie. New Hampshire's Democratic Senate hold since 2017, Pappas's incumbency in the competitive First District, and Sununu's prior 2008 defeat bolster the 83% implied probability for a Democratic win ahead of September 8 primaries.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$26,949 Vol.
$26,949 Vol.

Democrat
83%

Republican
17%
$26,949 Vol.
$26,949 Vol.

Democrat
83%

Republican
17%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 5:04 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...Incumbent Democrat Jeanne Shaheen's retirement has opened New Hampshire's Senate seat, with Rep. Chris Pappas dominating the Democratic primary at 61% in the latest University of New Hampshire survey of April 17-21. Pappas leads likely Republican nominee John Sununu 49%-42% and Scott Brown 52%-38% in head-to-head general election matchups from the same poll, shifting trader consensus toward Democrats after Emerson's March tie. New Hampshire's Democratic Senate hold since 2017, Pappas's incumbency in the competitive First District, and Sununu's prior 2008 defeat bolster the 83% implied probability for a Democratic win ahead of September 8 primaries.
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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