Maura Sullivan holds a strong lead in the September 8 New Hampshire Democratic primary for the open 1st Congressional District seat, driven by consistent advantages in fundraising totals exceeding $3.3 million, veteran endorsements, and recent polling momentum that has placed her ahead of Stefany Shaheen in the final stretch. Sullivan's background as a Marine veteran and former Obama administration official has resonated with voters seeking establishment credentials in the crowded field, while Shaheen's early name recognition as the daughter of retiring Sen. Jeanne Shaheen has been offset by lower cash reserves and negative advertising exchanges over donor sources. Carleigh Beriont has drawn progressive support after Heath Howard's withdrawal and endorsement, yet trails significantly in resources and surveys. Trader consensus reflects these late-campaign dynamics in the two days remaining before ballots close.