Harry S. Truman of the Democratic led the Missouri Senatorial election of 1940 with a total of 51.17% (930,775) of votes.
Harry S. Truman (May 8, 1884  December 26, 1972) was the 33rd president of the United States from 1945 to 1953, succeeding upon the death of Franklin D. Roosevelt after serving as the 34th vice president. Truman was elected to the United States Senate from Missouri in 1934 and gained national prominence as chairman of the Truman Committee aimed at reducing waste and inefficiency in wartime contracts. In the end, Stark and Milligan split the anti-Pendergast vote in the Senate Democratic primary and Truman won by a total of 8,000 votes. In the November election, Truman defeated Republican Manvel H. Davis by 5149 percent. 
