Full Breakdown
Sununu vs. Pappas: New Hampshire’s Open Senate Seat
By Drooid · · How we work
Primary Outcomes
Former Republican U.S. Senator John E. Sununu captured the GOP nomination with roughly 68 % of the vote, defeating former Massachusetts Senator Scott Brown, who earned about 26 %. Democratic U.S. Representative Chris Pappas secured the Democratic nomination with about 65 % of the vote, besting medical scientist Karishma Manzur, who received roughly 32 %. Both candidates now head into a November contest for the seat being vacated by retiring Senator Jeanne Shaheen.
Background & Context
Sununu served six years in the U.S. House and one term in the Senate (2003-2009) before losing to Shaheen in 2008. He comes from a political family that includes former governor John H. Sununu and current governor Chris Sununu. Pappas entered Congress in 2019, sits on the Problem Solvers Caucus, and has been endorsed by figures such as former Vice President Kamala Harris and Senator Elizabeth Warren.
Campaign Finance & Spending
Sununu’s primary campaign raised over $4 million, outpacing Brown’s roughly $2.1 million. Pappas’s campaign reported about $1 million more cash on hand than Sununu’s as of mid-August. Outside spending heavily favors the Republican side: Republican-aligned groups have poured roughly $24 million into Sununu’s race through Election Day, while Democratic-aligned groups have committed over $10 million on ads. The fund supporting Sununu’s general-election effort has allocated significant resources for the upcoming contest.
Polling Landscape
The race remains tight. An August 20-24 University of New Hampshire poll showed Sununu at 45 % and Pappas at 43 %. The same week, Saint Anselm College found Pappas ahead 48 %–41 %. An earlier March Emerson poll recorded a virtual tie (45 % Pappas, 44 % Sununu). The RealClearPolitics average (March-August) placed Pappas at 45.3 % and Sununu at 43.3 %, a two-point Democratic edge. Decision Desk HQ (September 8) rated the contest “Likely Democratic,” assigning a 78 % probability to a Pappas win; prediction-market pricing shows a similar 83 % chance for the Democrat.
Why It Matters
Control of the U.S. Senate hinges on a net gain of four seats for Democrats. Republicans hold 53 seats; a New Hampshire pickup would narrow the Democratic path to a majority. The state has not elected a Republican senator since 2010 and has voted for Democratic presidential candidates in recent cycles, making the race a bellwether for national dynamics.
Official Statements & Responses
Democratic strategist Jim Demers warned that national donors must not “take this one for granted” and urged additional fundraising to counter the Republican spending advantage.
Criticism & Opposition
Republican challenger Scott Brown accused Sununu of “coasting on his name,” arguing the former senator lacks a fresh independent stance. Democratic candidate Chris Pappas framed Sununu as aligned with former President Donald Trump, labeling him part of a “swamp” that raises costs for Granite Staters and asserting that Sununu’s policies favor “big corporations and billionaires.”
Conflicting Reports & Gaps
Polling data present divergent pictures: the UNH survey shows a slight Republican lead, while Saint Anselm and Emerson polls favor the Democrat or a tie. RealClear’s aggregated average leans Democratic, yet each poll’s margin of error overlaps, leaving voter preference uncertain. Campaign-finance filings confirm Sununu’s primary fundraising advantage, but the full extent of undisclosed outside spending remains opaque.
What’s Next
New Hampshire voters will decide the Senate seat on November 3, a scheduled election that could tip the balance of power in the U.S. Senate. Both campaigns have indicated intensified advertising and ground-game efforts in the weeks leading up to the vote.
