William Lee Knous resigned on April 15, 1950 to become Judge of the United States District Court for the District of Colorado. He was succeeded by Lieutenant Governor Walter W. Johnson.
Source for Popular Vote data: Colorado Secretary of State. Abstract of Votes Cast at a General Election Held on Tuesday, November 2, A.D. 1948, Colorado Secretary of State (https://www.sos.state.co.us/pubs/elections/Results/Abstract/pdf/1900-1999/1948AbstractBook.pdf) (accessed 21 Sep 2023)