but the public was able to increase the pressure on the white house. and so the president waived executive privilege for his lieutenants. >> the president also said that white house officials will testify before a special senate committee investigating the break-in and the bugging of democratic headquarters in washington last june. what he said there was a democratic change from his previous silence in the watergate case and his refusal to let white house aides testify before the senate. >> my lawyer made a decision very early that he thought i was a witness and not a defendant in any criminal proceeding. and he said i think that you should have immunity. and i want to go the senate and get it. . >> charlie shaffer approached sam dash and said john was willing to talk to us. >> sam said we're not going to grant immunity to anybody who can't deliver. so i start having these secret