Maura Sullivan has emerged as the clear frontrunner in New Hampshire’s 1st Congressional District Democratic primary, scheduled for September 8, due to her consistent fundraising dominance—raising over $3.3 million compared to Stefany Shaheen’s roughly $2.2 million—and recent polling gains that show her leading or tied among likely voters. Sullivan, a Marine veteran and former Obama administration official, has drawn endorsements from veterans groups and positioned herself on national security and cost-of-living issues, while Shaheen’s early name-recognition advantage as the daughter of retiring Sen. Jeanne Shaheen has been offset by attacks on outside donors and slower momentum. Carleigh Beriont has consolidated some progressive support following state Rep. Heath Howard’s withdrawal and endorsement, though she remains a distant third. High undecided shares and heavy outside spending underscore the race’s volatility ahead of primary day.