Alaska Senate 2026

Mary Peltola holds a slight lead in current forecasts and polling. As of October 22, 2026, quantitative forecasts and prediction markets generally favor Peltola, though specific probabilities vary. Decision Desk HQ assigns Peltola a 61% win probability against incumbent Republican Dan Sullivan's 39% ^[1]. Scrutinel shows Peltola at 51% to Sullivan's 49% ^[2]. Prediction Edge and Kalshi, along with a cross-platform comparison, indicate approximately 75% for Peltola versus 26–28% for Sullivan ^[3][4]. These market snapshots can differ materially by venue and timestamp; for instance, an October 20 Kalshi-based aggregation showed Peltola 75% and Sullivan 28%, while a Polymarket snapshot presented Peltola at 54% and Sullivan at 47% ^[3][4][5]. Recent polling remains extremely close, but generally gives Peltola a narrow edge. Rasmussen's October 12–15 survey placed Peltola at 44%, Sullivan at 42%, Gerald Heikes at 4%, and Dan J. Sullivan at 3%, with 6% undecided ^[6][7]. Decision Desk HQ's October 20 polling average shows Peltola at 49.1% and Sullivan at 47.5% ^[8].

Competing structural forces shape the race, with ranked-choice voting as a key mechanic. The November 3, 2026 general election field includes Mary Peltola, incumbent Dan S. Sullivan, Gerald Heikes, and Dan J. Sullivan ^[9][10]. Peltola and the incumbent advanced from the August 18 top-four primary with 49.5% and 41.4% respectively ^[9][10]. Peltola benefits from statewide personal appeal, Alaska Native identity, Democratic enthusiasm, economic dissatisfaction, and Republican vote fragmentation ^[11][12]. Sullivan benefits from Alaska's durable Republican baseline, incumbency, oil-and-gas advocacy, and voter skepticism toward the national Democratic Party ^[13][14]. Politico reports Republican concerns that the second Dan Sullivan could draw first-choice votes, and that some voters may not rank the incumbent in ranked-choice voting (RCV) ^[14]. Professional handicapper consensus reflects this competitiveness, with Cook Political Report and Inside Elections rating the race as a Toss-up or near Toss-up ^[15][16]. Sabato's Crystal Ball has moved the race towards Lean Democratic, though Inside Elections previously retained a Republican tilt ^[17][16].

Peltola remains the favored outcome, though a Sullivan path persists. Alaska's general election on November 3, 2026, utilizes ranked-choice voting, where voters rank candidates; if no candidate receives a majority of first-choice votes, lower-performing candidates are eliminated, and preferences are transferred until a candidate reaches 50% plus one vote ^[18][19]. Key late-campaign variables include Sullivan's ability to nationalize the race around Senate control and Alaska oil development, Peltola's success in preserving her personal and crossover coalition, the division of Republican first-choice votes among the two Sullivans and Heikes, and the pattern of second-preference transfers under RCV ^[13][14][12]. Based on available evidence as of October 22, Peltola is the likely winner, but not a certainty. A reasonable synthesis suggests Democratic Peltola is favored at roughly 60–70% probability based on DDHQ and other model evidence ^{[1][2][3][20]}. The more aggressive 75% market estimates should be discounted, as other models and reporting still characterize the race as close ^{[3][4][5][20]}. A meaningful path exists for Sullivan through Alaska's Republican fundamentals, late consolidation of voters, and favorable ranked-choice transfers ^{[1][2][3][20]}.