Karl Earl Mundt
Karl Earl Mundt was an American educator and a Republican member of the United States Congress, representing South Dakota in the United States House of Representatives from 1939 to 1948 and in the United States Senate from 1948 to 1973. Wikipedia*
On the C-SPAN Networks:
Karl Earl Mundt has two videos in the C-SPAN Video Library; the first appearance was a 1948 House Committee as a Republican Representative for South Dakota's 1st district.