Montana's 2026 Senate election turnout market centers on expectations for a midterm contest without a presidential race on the ballot. Traders price the 500K-550K range highest at 38.5%, followed closely by 450K-500K at 32.8%, reflecting uncertainty over participation levels in a state with historically strong turnout rates. Recent polling shows Republican Kurt Alme maintaining a double-digit lead over independent Seth Bodnar and Democrat Alani Bankhead, a dynamic that could influence enthusiasm and mobilization among different voter blocs. Total registered voters exceed 750,000, with past midterms like 2022 producing around 468,000 ballots cast while presidential years reached over 600,000. Key factors include independent voter engagement in a three-way race, campaign spending patterns, and any late-cycle events that might boost or suppress participation before November 3.