Start of involvement in politics with Democratic Party; entertaining in 1964 campaign; appearance with LBJ at Austin rally; suspicion that Hubert Humphrey's campaign was sabotaged; song selection for the different rallies; White House invitations; political humor; Lady Bird impression; LBJ's entertainment preferences; dances at White House; Shirley Maclaine; 1968 campaign appearances for Hubert Humphrey; LBJ's interest in dogs and his dog at White House; not asked by LBJ to sing at White House