New Hampshire Primary Sets Stage for High-Stakes US Senate Battle

2026-09-09 politics

Concord, Wednesday, 9 September 2026.
Democrat Chris Pappas and Republican John Sununu won their respective September 8 primaries, setting up a competitive November election for an open seat that could shift Senate control.

Democratic Primary Dynamics and Voter Turnout

In the Democratic primary, Representative Chris Pappas secured a decisive victory over challenger Karishma Manzur, garnering 30,925 votes compared to Manzur’s 18,125 votes [7]. The vote margin between the incumbent and the challenger was 12800 votes, reflecting a significant establishment advantage despite progressive headwinds [7]. Pappas, who has served in the House since 2019, leveraged endorsements from former Vice President Kamala Harris and Senator Elizabeth Warren to consolidate moderate support [1][2]. Manzur, a biochemist and Democratic Socialists of America member, campaigned on a platform of Medicare for All and corporate tax increases, capturing 36.2% of the vote [7][3].

Pappas emphasized the need for a broad coalition, stating that winning requires meeting people where they are rather than relying solely on television advertising [1]. His campaign reported over $4 million cash on hand leading into the primary, facilitating a robust ground game across the state [1]. While Manzur declined to commit to supporting the eventual Democratic nominee if she lost, Pappas affirmed his support for the party’s choice, aiming to unify Democrats heading into the general election [1][3]. The total reported votes for the Democratic Senate primary reached 50,116, with Pappas securing 61.7% of the tally [7].

Republican Primary and Trump’s Influence

On the Republican side, former Senator John Sununu won the nomination with 19,887 votes, representing 69.0% of the total reported GOP primary votes [7]. Sununu defeated former Massachusetts Senator Scott Brown, who received 7,410 votes, and Sky Danley, who received 317 votes [7]. Despite a 2024 op-ed where Sununu referred to Donald Trump as a loser, the former president endorsed Sununu earlier in 2026, a move critical for securing the base in a state where Trump’s approval rating hovers around 38% [1][3]. Sununu has attempted to balance this endorsement with criticism of specific Trump policies, including tariffs and military actions in Iran, which he labeled a tactical mistake in late August 2026 [1][3].

The Republican National Committee views Sununu as well-positioned to defeat Pappas, citing Democratic infighting as a key advantage [1]. Sununu’s campaign focused on affordability and security, contrasting with Brown’s independent-leaning advertising against D.C. special interests [1][2]. The Republican primary saw a total of 28,832 votes reported, with Sununu carrying key towns such as Berlin and Concord by significant margins [7]. This consolidation allows the GOP to focus resources on the general election battle for the seat vacated by retiring Senator Jeanne Shaheen [2][3].

Legislative and Statewide Down-Ballot Results

Beyond the Senate race, New Hampshire voters decided nominations for the U.S. House and state legislature. In the 1st Congressional District, Stefany Shaheen led the Democratic field with 10,534 votes, while Maura Sullivan followed with 9,895 votes, and Carleigh Beriont secured 6,895 votes [5]. Incumbent Representative Maggie Goodlander dominated her 2nd District primary with 16,727 votes against challenger Paige Beauchemin’s 4,203 votes [5]. On the Republican side for the House, Anthony DiLorenzo won the 1st District nomination with 50.7% of the vote, and Lily Tang Williams secured the 2nd District nomination with 63.8% [5].

At the state level, Governor Kelly Ayotte faced no major primary challengers as she seeks a second term, having been sworn in on January 9, 2025 [3]. Numerous state representative seats were decided, with many incumbents running unopposed in districts across Belknap, Carroll, and Hillsborough counties [4]. In contested state house races, such as Belknap 6, Priscilla M. Bean secured the Republican nomination with 21.8% of the vote [4]. These down-ballot results will influence the state legislature’s stance on federal issues and redistricting efforts leading into the 2030 cycle [3][6].

General Election Stakes and Senate Control

The November 2026 general election will determine the balance of power in Congress, with Democrats needing a net gain of four seats to flip the Senate chamber [2]. The Cook Political Report currently rates the New Hampshire Senate race as Lean Democratic, though it remains competitive given the national environment [7]. Control of the Senate impacts legislative agendas and subpoena power for the remainder of President Trump’s term [2]. The general election is scheduled for November 2026, providing candidates two months to campaign across the swing state [2][3].

Both parties recognize the critical nature of this seat, as a Republican victory would require Democrats to flip an additional seat elsewhere to achieve a majority [2]. Pappas aims to maintain the seat for Democrats, while Sununu seeks to reclaim his former position and aid Republican control [1]. Voter turnout in the general election will be closely monitored against the primary’s 50,116 Democratic and 28,832 Republican Senate votes [7]. The outcome will signal broader trends for the 2028 presidential cycle and the viability of moderate versus progressive platforms in swing states [3][6].

Sources

Senate Primary New Hampshire