trump's strategy to essentially personify this to essentially go back to the same play book he used against bob mueller and the prosecutors and christopher steele to besmer. their background isn't going to work. you have a series of witnesses to what appears to be a crime. >> who are those potential witnesses? >> you're familiar with these sort of calls. who are the potential witnesss? >> i think you have to think about it in two ways. one are the people who were in the room. or the people who were on the line. and i think contrary to what we've heard from some corners c that's not a small group. when the president places a phone call, there are usually a couple people, a few people in the oval office. there are people listening in from the white house situation room to write the transcript. that transcript is circulated throughout the national security