The United States Senate election of 1958 in Connecticut was held on November 4, 1958. Democratic Thomas J. Dodd defeated incumbent senator William A. Purtell who ran for a second term.
Purtell was one of ten Republican senators to be defeated in the 1958 elections, part of a record swing of 15 seats gained by the Democratic party that year. Dodd would go on to serve two terms in the Senate.
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Text from the Wikipedia article “1958 United States Senate election in Connecticut”, available under CC BY-SA 4.0.