1966 United States Senate elections in Michigan

none March 2026 September 2023 1966 United States Senate election in Michigan Michigan Flag of Michigan.svg presidential no 1960 United States Senate election in Michigan 1960 1972 United States Senate election in Michigan 1972 November 8, 1966 150x150px Robert P. Griffin 1969.png Robert P. Griffin Republican Party (United States) 1,363,530 55.90% G. Mennen Williams (1968).png G. Mennen Williams Democratic Party (United States) 1,069,484 43.85% 1966 United States Senate election in Michigan results map by county.svg 300px County resultsGriffin: #e27f7f 50–60% #d75d5d 60–70% #d72f30 70–80%Williams: #a5b0ff 40–50% #7996e2 50–60% U.S. Senator Robert P. Griffin Republican Party (United States) Robert P. Griffin Republican Party (United States) The 1966 United States Senate elections in Michigan were held on November 7, 1966. Incumbent Republican U.S. Senator Robert P. Griffin, who had been appointed to the seat in May to fill the vacancy left by the death of Patrick V. McNamara, was re-elected to a full term in office. Griffin defeated Democratic former Governor G. Mennen Williams in the regularly scheduled election, as well as the concurrent special election to complete McNamara's unfinished term. Democratic primary Candidates Jerome P. Cavanagh, Mayor of Detroit G. Mennen Williams, Assistant U.S. Secretary of State for Africa Affairs and former Governor of Michigan (1949–1961) Results thumb|center|Primary results by county Williams #3358a2 Williams—80–90% #4170cd Williams—70–80% #678cd7 Williams—60–70% #8da9e2 Williams—50–60% Cavanagh #c0a32f Cavanagh—50–60% 1966 U.S. Senate Democratic primary in Michigan (full term)https://www.ourcampaigns.com/RaceDetail.html?RaceID=764408 Our Campaigns - MI US Senate - D Primary Race - Aug 02, 1966 Democratic Party (United States) G. Mennen Williams 437,438 60.10% Democratic Party (United States) Jerome P. Cavanagh 290,465 39.90% 2 0.00% 727,905 100.00% 1966 U.S. Senate Democratic primary in Michigan (partial term)1967 Michigan manual 1967/1968 https://babel.hathitrust.org/cgi/pt?id=mdp.39015071179264 409-412, 460-463 English Democratic Party (United States) G. Mennen Williams 381,496 59.57% Democratic Party (United States) Jerome P. Cavanagh 258,822 40.42% 6 0.00% 640,324 100.00% Republican primary 1966 U.S. Senate Republican primary in Michigan (full term) Republican Party (United States) Robert P. Griffin 387892 99.99% 31 0.00% 387923 100.00% 1966 U.S. Senate Republican primary in Michigan (partial term) Republican Party (United States) Robert P. Griffin 356,700 99.99% 32 0.00% 356,732 100.00% General election Results Regular 1966 U.S. Senate election in Michigan http://clerk.house.gov/member_info/electionInfo/1966election.pdf Statistics of the Congressional Election of November 8, 1966 Clerk of the United States House of Representatives U.S. Government Printing Office 1967 Republican Party (United States) Robert P. Griffin (incumbent) 1,363,530 55.89% Democratic Party (United States) G. Mennen Williams 1,069,484 43.84% Socialist Labor Party (US) Ralph W. Muncy 6,166 0.25% 185 0.00% 2,439,365 100.00% Special 1966 U.S. Senate special election in Michigan Republican Party (United States) Robert P. Griffin (incumbent) 1,321,222 56.00% Democratic Party (United States) G. Mennen Williams 1,031,138 43.70% Socialist Labor Party (US) Ralph W. Muncy 6,444 0.27% 296 0.01% 2,359,100 100.00% See also 1966 United States Senate elections References Michigan 1966 United States Senate elections Michigan 1966 Michigan 1966 United States Senate 1966