Lyndon Johnson May 12, 1966
Lyndon Johnson October 6, 1966
Lyndon Johnson November 3, 1966
Lyndon Johnson December 15, 1966
Lyndon Johnson December 20, 1966
Lyndon Johnson February 9, 1967
Harry Truman March 23, 1967
Harry Truman and James Byrnes June 15, 1967
Lyndon Johnson and Air Marshall Ky September 14, 1967
Lyndon Johnson January 4, 1968
Lyndon Johnson April 5, 1968
Lyndon Johnson et al. April 11, 1968
Lyndon Johnson May 9, 1968
Richard Nixon June 20, 1968
Richard Nixon and Spiro Agnew September 12, 1968
Richard Nixon October 10, 1968
Richard Nixon and Hubert Humphrey October 24, 1968
Richard Nixon January 2, 1969
