Eisenhower, Dwight D.	July 22, 1952
	November 11, 1952
	January 21, 1956
	August 30, 1960
Goldwater, Barry	January 11, 1956
	July 29, 1964
	November 10, 1966
Humphrey, Hubert H.	January 4, 1966
Kennedy, John F.	August 8, 1958
McCarthy, Joseph R.	May 20, 1947
	January 10, 1948
	September 24, 1951
	February 25, 1954
	June 21, 1955
	January 23, 1957
	April 12, 1957
Nixon, Richard M.	January 23, 1957
	January 5, 1959
	November 16, 1959
Taft, Robert A.	February 18, 1947
	August 3, 1948
	November 17, 1952