Stefany Shaheen holds a clear lead in trader consensus for the September 8, 2026, New Hampshire Democratic primary for the 1st congressional district, driven by her established polling advantage, name recognition tied to her family’s long-standing political presence, and recent endorsements including from the American Federation of Teachers. Maura Sullivan trails as the main challenger, drawing support from her background as a Marine veteran and prior statewide party role, while Heath Howard and Carleigh Beriont remain distant with limited visibility. Recent August 2026 campaign activity—house parties, voter outreach events, and issue-focused debates on healthcare costs and housing—has not produced major shifts, leaving Shaheen’s position stable into the final weeks before primary day.