wu is a former federal prosecutor. joining us as well, longtime political sage, david gergen., do you think this is going to come to, especially for a committee like the senate intelligence committee, one set of facts leading to two very different conclusions? >> not really. i think we're still in the midst of an investigation in which, oddly, these two men are actually -- each of those 20ese men, i think, is telling the truth. senator burr has said, we've had a lot of hearings and we haven't seen any evidence of collusion. senator warner, the democrat, is silent on that question. he's avoiding the question of whether they have no evidence so far, whether what he's saying is, we shouldn't reach conclusions about whether there's been collusion until we have complete evidence. and we don't have that so far. and the guy who really has it is going to have it in the send mueller. back in the background here, what warner is saying is, mueller has many more pieces of this puzzle in his possession already than the senate intelligence committee has. and therefore, we should wait and yo