The competitive U.S. Senate contest between incumbent Republican Dan Sullivan and Democratic challenger Mary Peltola, rated a toss-up or lean Democratic by multiple forecasters, is the main driver of trader expectations for first-round turnout in Alaska’s November 3 general election under ranked-choice voting. The August top-four primary drew unusually high participation of roughly 167,000 ballots, or 27.7 percent of registered voters, fueled by the same high-profile matchup and a crowded gubernatorial field. Traders appear to price in elevated general-election mobilization from both parties, strong early and absentee voting, and the absence of a presidential contest at the top of the ticket, producing tightly bunched probabilities across the 275,000–320,000 range. Key variables that could widen spreads include final polling shifts, coordinated get-out-the-vote efforts, weather on Election Day, or late developments affecting voter enthusiasm in this low-population state.