In 1941 he married June Young of Hurley Missouri; they had two children, Ann and William, plus 4 grandchildren.
Congressman
When his father died in office on December 7th, 1942; Bennett was chosen in a special election to complete his father's term in the 78th Congress. He was 28 years old. Winning reelection twice, he served in the 79th and 80th Congresses.[2]
Tour of German concentration camps
Bennett was part of an official ten-member Congressional delegation invited by General Dwight D. Eisenhower to follow the United States Third Army into Buchenwald concentration camp near Weimar, Germany in 1945. The delegation's members toured the United States speaking and reporting on what they had seen of the horrific conditions in the camp. Bennett is quoted in the New York Times on May 6, 1945, "I left Buchenwald convinced that every German must be killed."[3]
Federal judicial service
Following the end of his Congressional service, Bennett was appointed as a Trial Judge (Commissioner) of the United States Court of Claims, in which position he served from 1949 to 1972. He served as Chief of the Trial Division of the Court of Claims from 1964 to 1972.[1]
American immigration policies : a history by Marion T. Bennett. Washington: Public Affairs Press, c1963.
Private claims act and congressional references [by Marion T. Bennett]. Washington: U.S. Govt. Print. Off., 1968.
The United States Court of Claims: a history, pt. 1. The judges, 1855-1976, by Marion T. Bennett / pt. 2. Origin, development, jurisdiction, 1855-1978, W. Cowen, P. Nichols, M.T. Bennett. Washington, D.C.: Committee on the Bicentennial of Independence and the Constitution of the Judicial Conference of the United States, 1976 i.e. 1977-1978. 2 vol.