Maura Sullivan has emerged as the clear frontrunner in New Hampshire’s 1st Congressional District Democratic primary, driven by superior fundraising totals exceeding $3.3 million, veteran endorsements, and recent polling gains that show her ahead or statistically tied with rivals in the final stretch before the September 8 vote. Stefany Shaheen, an early leader leveraging name recognition as the daughter of retiring Sen. Jeanne Shaheen, has faced headwinds from attacks over outside super PAC spending and fundraising shortfalls relative to Sullivan. Carleigh Beriont has shown modest grassroots momentum among progressives in late surveys, while Heath Howard suspended his campaign in late August. The race has featured intense negative exchanges on healthcare positions and donor influence, with multiple undecided voters complicating the outcome in this open-seat contest.