New Hampshire’s 2026 primary elections have helped shape the field of candidates for one of the most closely watched Senate races in the country, giving early hints about how both parties are positioning themselves ahead of the midterm elections. The open seat in the state Senate created by the retirement of Sen. Jeanne Shaheen has become a major target for both Democrats and Republicans.
Democratic Rep. Chris Pappas clinched his party’s Senate nomination after beating progressive challenger Karishma Manzur and others. Pappas jumped into the race with the backing of Democratic leaders and positioned himself as a pragmatic candidate who could win in a battleground state.
Republican: Former Sen. John E. Sununu won the GOP nomination, defeating former Massachusetts Senator Scott Brown and other challengers. Sununu was backed by former President Donald Trump, although he has been critical of Trump’s politics.
The Pappas-Sununu matchup is shaping up to be one of the most competitive Senate races of the 2026 cycle. Democrats see the seat as a way to boost their chances of taking control of the Senate, and Republicans see New Hampshire as a way to pad their majority.
New Hampshire’s political significance comes from its history as a swing state. Democrats have been strong in recent federal elections, but Republicans still hold a lot of power in state government. And the state has emerged as a bellwether for national political trends, a blend of independent voters, competitive races and unpredictable results.
The main findings also indicated that both parties preferred experienced candidates over new challengers. Both Pappas and Sununu stressed their political resumes and ability to appeal beyond their party bases, setting the tone for a general election likely to be dominated by economic concerns, national security and the direction of the country.
Trump’s Influence on Republican Strategy in New Hampshire
The Republican primary showed the continuing strength of Donald Trump in the party, even as some candidates try to balance loyalty to his movement with outreach to a broader electorate. It was notable that John Sununu was victorious given his complex history with Trump.
Sununu has been critical of Trump in the past and has disagreed with some of his policies, including trade and executive power. But Trump later endorsed him, aiding Sununu’s campaign in the Republican primary.
The endorsement showed Trump’s continuing ability to influence Republican contests, especially in races where party voters are still closely aligned with his political agenda. But Sununu’s campaign also stressed independence and New Hampshire-centric issues, a nod to the state’s historically moderate political culture.
Republicans see Sununu as a strong candidate, noting his prior Senate experience and long history of politics in New Hampshire. His family name is a familiar one, with his brother Chris Sununu serving as the state’s governor.
Democrats, in turn, are expected to focus on Sununu’s ties to Trump as part of their general election strategy. The party hopes to put national issues front and center in the Senate race, and it fears what may come for the Republican Party.
The Republican primary also highlighted a broader national trend in which candidates are still searching for their footing between Trump’s influence and the wishes of voters in the state. In states like New Hampshire, where independents are an important voting bloc, candidates often seek to marry party support with a more moderate image.
The Senate race is expected to be a major test of whether Trump's endorsement power can translate into victories in battleground states and if GOP candidates can hold onto support from both conservative voters and independents.
Democrats Debate Path Forward in Democratic Primary
The Democratic Senate primary showcased intraparty arguments over ideology, tactics and the best way to win competitive states. Chris Pappas defeated Karishma Manzur, a member of a more progressive wing of the party with positions focused on expanding government programs and altering US foreign policy approaches.
Pappas, running as a moderate Democrat with a wide appeal, touted his experience in Congress and his ability to compete in a state where independent voters often decide elections. His candidacy was backed by leading Democrats, including retiring Sen. Jeanne Shaheen and other national party leaders.
Manzur attacked Pappas from the left, criticizing his stances on health care policy and U.S. support for Israel. Her campaign was part of bigger discussions in the Democratic Party about the party’s direction, and whether to pursue more progressive policies or candidates perceived to be more electorally moderate.
The findings indicate that New Hampshire Democrats would favor a candidate with a better record of winning statewide support over a candidate who represents a more pronounced ideological shift. But the primary also demonstrated that progressive issues remain salient among Democratic voters.
There was also interest in Democratic House races, as well as the Senate race. Stefany Shaheen, daughter of retiring Senator Jeanne Shaheen, won the Democratic primary for the state’s 1st Congressional District, continuing a political family legacy while trying to forge her own path.
The Democratic results provide an early look at the party's overall midterm strategy. Candidates are struggling to motivate the base of the party while appealing to independent voters who often decide close races in places like New Hampshire.
Preliminary Results Offer Early Outlook for 2026 Midterm Landscape
The New Hampshire primaries are seen as an early test of what voters care about most before the wider 2026 midterm election campaign heats up. The results suggest that both sides are headed for close races where small shifts among independent voters could tip the scales.
The battle for the Senate seat between Chris Pappas and John Sununu is likely to draw a lot of national attention as control of the chamber could come down to races in places like New Hampshire. Both sides will have to pour lots of money into advertising, voter outreach and campaign resources.
The general election campaign is likely to be dominated by economic issues. Affordability, inflation, healthcare costs and economic security will be top of mind for voters as they weigh up the performance of the current government and the proposals candidates will put forward.
National political issues will also be a factor in the race. Issues like immigration, foreign policy, government spending and the role of executive power are set to impact voters throughout the campaign.
The results also underscore New Hampshire’s reputation as a politically unpredictable state. Even under Republican control of the state government, Democrats have continued to win at the federal level, making the state competitive and preventing one-party dominance.
These primaries are just an early barometer of what voters are thinking. The political climate could look very different by November. Voters’ approach to the general election will be shaped by national events, economic conditions and how the candidates do.
New Hampshire will continue to be a hotly contested battleground as the 2026 midterm campaign heats up. The Senate race, congressional races and larger political trends from the state could offer important clues about the national electoral landscape.