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1964 Montana U.S. Senate Election
Montana · 2 candidates
Mansfield +29.0 pts · won by 81,276 votes
Mike MansfieldDemocraticWINNER64.51%
180,643 votes
Alex BlewettRepublican35.49%
99,367 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).