Stefany Shaheen holds an 89.2% implied probability in the New Hampshire 1st Congressional District race because the open seat has leaned Democratic in recent cycles, with ratings from the Cook Political Report and others classifying it as likely or lean Democratic. Shaheen secured the Democratic nomination in the September 8 primary through strong name recognition as the daughter of retiring Sen. Jeanne Shaheen, along with endorsements from state party figures, overcoming a crowded field that included Maura Sullivan. Anthony DiLorenzo captured the Republican nomination with backing from President Trump and substantial self-funding, but the district’s voting patterns and Democratic primary turnout advantage limit his general-election prospects. The November contest remains the key resolution point.