The retirement of Democratic Sen. Jeanne Shaheen has opened the New Hampshire Senate seat for the November 2026 election, with primaries set for September 8. Rep. Chris Pappas holds a commanding lead in the Democratic primary over Karishma Manzur, backed by party endorsements and fundraising, while former Sen. John Sununu dominates the Republican primary against Scott Brown. General election polling shows a tight contest between Pappas and Sununu, with averages placing Pappas ahead by a few points amid the state's modest Democratic lean at the federal level. Forecasters rate the race as Lean Democratic or a toss-up, and traders appear to price in structural headwinds for Republicans, including no GOP Senate victory in New Hampshire since 2010, while noting Sununu's recent polling gains could narrow the gap before November.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$96,207 Vol.
$96,207 Vol.

Democrat
84%

Republican
18%
$96,207 Vol.
$96,207 Vol.

Democrat
84%

Republican
18%
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...The retirement of Democratic Sen. Jeanne Shaheen has opened the New Hampshire Senate seat for the November 2026 election, with primaries set for September 8. Rep. Chris Pappas holds a commanding lead in the Democratic primary over Karishma Manzur, backed by party endorsements and fundraising, while former Sen. John Sununu dominates the Republican primary against Scott Brown. General election polling shows a tight contest between Pappas and Sununu, with averages placing Pappas ahead by a few points amid the state's modest Democratic lean at the federal level. Forecasters rate the race as Lean Democratic or a toss-up, and traders appear to price in structural headwinds for Republicans, including no GOP Senate victory in New Hampshire since 2010, while noting Sununu's recent polling gains could narrow the gap before November.
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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