U.S. Rep. Chris Pappas commands trader consensus at 88.5% implied probability to win New Hampshire's Democratic Senate primary on September 8, driven by his dominant polling leads—71% in the March Saint Anselm survey versus challenger Karishma Manzur's 9%—and overwhelming fundraising edge, with $3.3 million raised in Q1 2026 and $4.2 million cash on hand announced last week. As the sitting congressman with strong name recognition from multiple reelections in the competitive 1st District, Pappas benefits from incumbency advantages in the open-seat race following Sen. Jeanne Shaheen's retirement. Manzur, a medical scientist polling second at 4.2%, draws progressive support on issues like housing and child care but trails significantly amid Pappas' financial dominance; state Rep. Jared Sullivan lags further. Late-breaking endorsements or scandals could shift dynamics, though current evidence favors Pappas.