Stefany Shaheen secured the Democratic nomination for New Hampshire’s 1st Congressional District in the September 8, 2026 primary, earning trader consensus at 100% on Polymarket. Her victory stems from strong name recognition as the daughter of retiring U.S. Sen. Jeanne Shaheen, combined with prior service on the Portsmouth City Council and Police Commission, plus endorsements from labor groups and elected officials. In a crowded field that included Maura Sullivan, Carleigh Beriont, and others, Shaheen prevailed narrowly with a plurality of votes amid a competitive contest focused on healthcare, campaign finance, and local priorities. Late endorsements, including from Christian Urrutia, and vote consolidation helped her edge Sullivan. Resolution depends on official certification, though late shifts remain improbable absent a successful recount challenge.