What just happened in New Hampshire?
Former Republican Senator John Sununu has won his party’s primary in New Hampshire, positioning himself as the GOP nominee for the U.S. Senate seat being vacated by retiring three-term Democratic Senator Jeanne Shaheen. He defeated former Massachusetts Senator Scott Brown and a field of other Republican challengers. On the Democratic side, Representative Chris Pappas — who has held New Hampshire’s 1st Congressional District since 2019 — won his party’s nomination, defeating progressive challenger Karishma Manzur. The November general election now takes shape as one of the most closely watched Senate contests in the country, with Senate control potentially hanging in the balance.
Why does this seat matter so much?
The stakes here are straightforward: this is a Democratic-held seat that Republicans are actively trying to flip. Senator Shaheen, who first won this seat in 2008 by defeating Sununu himself, is retiring after three terms. Democrats have held the seat continuously since then — a run of nearly two decades. Republicans need to defend their current Senate majority, and flipping a seat like this one would help insulate that majority against losses elsewhere. Democrats, meanwhile, need to hold seats like this one as part of any realistic path back to controlling the chamber.
New Hampshire has not sent a Republican to the U.S. Senate since 2010, when Kelly Ayotte — now the state’s Republican governor — defeated Democrat Paul Hodes. That 15-year Democratic Senate streak makes this race a genuine test of whether Republicans can break through in a state that remains genuinely competitive at the statewide level.
Who is John Sununu, and why does he start with real advantages?
Sununu, 61, is not a political newcomer by any measure. He served three terms in the U.S. House before winning election to the Senate in 2002. He held that Senate seat from 2003 to 2009, when Shaheen defeated him in his reelection bid. The 2026 race therefore gives him a direct shot at reclaiming the seat he lost nearly two decades ago — a narrative that gives his campaign a built-in story and motivates his donor base.
His family name carries enormous weight in New Hampshire Republican politics. His father, John H. Sununu, served as the state’s governor and later as chief of staff to President George H.W. Bush. His younger brother, Chris Sununu, served four terms as New Hampshire governor before leaving office in 2025. That kind of multi-generational political infrastructure — name recognition, donor networks, institutional relationships — is a structural advantage that money alone cannot easily replicate.
President Donald Trump endorsed Sununu in the primary despite a history of public criticism of Trump from Sununu and other members of his family. The endorsement held, and Sununu cleared the field comfortably, defeating Scott Brown, who previously represented Massachusetts in the Senate and later served as Trump’s ambassador to New Zealand and Samoa.
Who is Chris Pappas, and what kind of Democrat is he?
Pappas has represented New Hampshire’s 1st Congressional District since 2019 and entered the Senate race after Shaheen announced her retirement. He enters the general election with significant institutional backing: endorsements from Shaheen herself, Democratic Senator Maggie Hassan, and former Vice President Kamala Harris.
It is worth being precise about where Pappas sits ideologically. He is a mainstream, center-left Democrat — not a progressive in the structural sense. His primary victory over Karishma Manzur, a progressive challenger, reflects the same tension between the party’s establishment wing and its left flank that has played out in Democratic primaries across the country. Whether that positioning helps or complicates his general election campaign in a competitive state is a genuine open question.
How competitive is New Hampshire, really?
That pattern matters for how to read Sununu’s chances. His name recognition and Senate experience are real assets. But the structural lean of the state in federal elections, combined with the national environment and the Democratic establishment’s consolidation behind Pappas, means this is not a race Republicans should assume they will win simply by fielding a credible candidate.
What should readers watch between now and November?
The November contest between Sununu and Pappas will be one of a handful of Senate races that genuinely determine which party controls the chamber. For voters who care about federal policy on healthcare, housing, environmental regulation, and economic fairness, the outcome here will carry real consequences — not just symbolic ones.