Rep. Chris Pappas won New Hampshire’s Democratic Senate primary and will face former Sen. John Sununu, the Republican nominee, in November for the seat being vacated by retiring Sen. Jeanne Shaheen. Pappas defeated progressive challenger Karishma Manzur, while Sununu won the Republican nomination with President Donald Trump’s endorsement, beating several candidates including former Massachusetts Sen. Scott Brown. The race is among a small number of open Senate contests and could affect control of a chamber Republicans currently hold by 53-47. Both candidates have millions of dollars available, making substantial outside spending likely. Earlier polling showed a close contest, although Democratic-aligned analysts have generally viewed New Hampshire as favorable to Pappas. In the Democratic primary for Pappas’s House seat, Stefany Shaheen narrowly defeated Maura Sullivan and will face Republican Anthony DiLorenzo in November.