public session and you can issue a subpoena, but also donald trump has been talking about a witch-hunt. it seems to me that one of the things that the investigators in the house and the senate want to do is make sure that there is nothing that even could be interpreted as a witch-hunt. >> not make it a spectacle? >> well, first find out what these people have to say. find out what evidence they have. ask them are they going to be forthcoming and go on with the procedure that is normal investigative procedure that enables them to have a hearing in which the most evidence is produced. this is a first step. it puts the onus on manafort, it puts the onus on donald trump jr. to come up with information. if they don't, there are plenty of avenues left to the investigators to bring them before the full committee. >> adam, is it clear how much information the committees will get in terms of e-mails? i mean donald trump jr. has shown, you know, photographs of