Stefany Shaheen leads the New Hampshire 1st Congressional District Democratic primary at 54.5% in trader consensus, followed closely by Maura Sullivan at 42.5%, with the remainder split among minor candidates including Carleigh Beriont and Heath Howard. Shaheen benefits from strong name recognition as the daughter of retiring Sen. Jeanne Shaheen, competitive fundraising, and early polling leads, while Sullivan leverages her background as a Marine veteran, former Obama administration official, and state party vice chair. A late-August Saint Anselm poll showed the two in a statistical dead heat at 26%-24%, tightening from earlier surveys where Shaheen held a clearer edge. Negative exchanges over healthcare positions and campaign donors have intensified in the final weeks before the September 8 primary, leaving the outcome sensitive to turnout and late shifts in voter familiarity.