The part of Special Assistant to the President Jack Valenti was played by his son, John Valenti, in the latter's first acting role. Jack Valenti later headed the Motion Picture Association of America for 38 years.
Gov. George Wallace. He previously played Wallace in George Wallace (1997), also directed by John Frankenheimer. The footage of Wallace on television is from Sinise's performance in that film. In the scene right after he is also showed taking a publicly shot with LBJ, then talking to LBJ then ending with a press conference.