The United States Senate election of 1940 in Connecticut was held on November 5, 1940. Incumbent Democratic Senator Francis T. Maloney was re-elected to a second term in office. Maloney did not complete the term; he died in 1945. This was the first time that the Democrats were ever re-elected to the Senate from the state.
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Text from the Wikipedia article “1940 United States Senate election in Connecticut”, available under CC BY-SA 4.0.