Republican John E. Sununu and Democrat Chris Pappas secured their primary victories in New Hampshire on September 8, 2026, advancing to a high-stakes United States Senate race to succeed outgoing Democratic Senator Jeanne Shaheen in a contest that could reshape the balance of power in Washington.
The Battle for the New Hampshire Senate Seat
With control of the United States Senate hanging in the balance, both major parties are pouring immense focus into the Granite State. Democrats are defending the seat currently held by outgoing Senator Jeanne Shaheen, needing a net gain of four seats nationally to retake the chamber. Meanwhile, the Republican Party views the open race as a prime pickup opportunity to establish a firm foothold in New England.
Former Senator John E. Sununu navigated a crowded primary field of seven opponents—including a former Massachusetts state senator—to capture the Republican nomination. On the Democratic side, House Representative Chris Pappas turned back a challenge from democratic socialist Karishma Manzur, who had gained momentum in recent weeks while criticizing Pappas over his relationship with the American Israel Public Affairs Committee (Al Jazeera).
Trump endorsed Sununu despite previously labeling the Republican candidate a loser
during the 2024 presidential race.
The underlying political terrain remains fiercely competitive. In the 2024 presidential election, Kamala Harris carried New Hampshire by a slim margin of 2.78 percentage points over Donald Trump, establishing the state as a battleground where split-ticket voting is commonplace.
Congressional Primaries Shape House Contests
Down-ballot primaries on September 8, 2026, set up contentious matchups for the state’s congressional districts. In the 1st Congressional District, Stefany Shaheen—daughter of the retiring senator—defeated retired Marine Maura Sullivan in a hard-fought Democratic primary to compete for the seat left vacant by Pappas. In the 2nd Congressional District, Democratic incumbent Maggie Goodlander successfully turned aside a progressive challenge from Paige Beauchemin.
On the Republican side of the House contests, Anthony DiLorenzo cruised to victory in the 1st District primary after securing an endorsement from Donald Trump. In the 2nd District, Lily Tang Williams secured the Republican nomination without facing major opposition, setting up a general election showdown against Goodlander after having previously run as the GOP nominee in the 2024 cycle (Al Jazeera).
Gubernatorial Dominance and Regional Momentum
While federal races showcase deep partisan divides, the state gubernatorial primary played out with starkly different dynamics. Former US Senator and State Attorney General Kelly Ayotte dominated the Republican gubernatorial primary by defeating two lesser-known challengers. Ayotte is pursuing a second two-year term as governor, where she will face Cinde Warmington, who advanced through the Democratic primary unopposed (Al Jazeera).
With primary ballots tallied across Manchester and throughout the state, the campaigns now pivot toward a compressed two-month sprint to the November general election, where the fate of the Senate seat will be decided.
