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1966 Michigan U.S. Senate Election
Michigan · 3 candidates
Griffin +12.0 pts · won by 294,046 votes
Robert P. GriffinRepublicanWINNER55.9%
1,363,530 votes
G. Mennen WilliamsDemocratic43.85%
1,069,484 votes
Ralph W. MuncySocialist Labor0.25%
6,166 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).