Stefany Shaheen holds a commanding position in the New Hampshire 1st Congressional District Democratic primary due to her strong name recognition as the daughter of retiring U.S. Senator Jeanne Shaheen, combined with consistent polling leads and recent union backing from the American Federation of Teachers. As a former Portsmouth city councilor with a focus on health care access and local issues, she benefits from established party networks and voter familiarity ahead of the September 8 vote. Maura Sullivan, a Marine veteran, former Obama administration official, and 2018 candidate for the seat who serves as vice chair of the state Democratic Party, remains the primary challenger through competitive fundraising and targeted outreach on veterans’ issues and costs, though she trails in surveys. Heath Howard, a sitting state representative, and Carleigh Beriont draw limited support in a field where early endorsements and visibility favor frontrunners. Trader pricing reflects these dynamics in a race with several weeks remaining for late shifts in momentum.