the question of whether there is a wiretap or was a wiretap, that's something that congress often asks and doesn't get answers. >> okay. here's a reaction, by the way, senator john mccain to the president's charge. >> i think that the president of the united states who has stated categorically that trump tower was wiretapped, that he should come forward with the information that led him to that conclusion. it's a very serious charge against the previous president of the united states. >> well senator mccain, i think, is from the sane era of politics. here's how some other top republicans reacted including senate majority leader mitch mcconnell and chair of the senate and house intelligence committees. >> i think we have an existing committee, the intelligence committee, looking at all aspects of what may have been done last year related to the russians or the campaigns and we'll leave it there. >> have you seen any evidence of that?