you cc a lawyer on an e-mail, you bring a lawyer in, have them sit in, that by itself does not shield things. >> so, what can house investigators or robert mueller, what can you do to compel -- somebody's claiming attorney-client privilege and it doesn't hold up, how do you force them to talk? >> the mueller team will talk to donald trump jr., presumably, ask questions, he'll invoke some privilege, the team will think that's ludicrous or frivolous and then they'll go the court. they have a court process and they can compel him to talk about it. if he doesn't, he could potentially be held in contempt. there are various remedies i think bob mueller and his team, that has, you know, proceedings in front of a court, a grand jury in place, has a lot more access to compulsory process than the congress does. >> we've heard the president say there's no collusion in regards to russia, congressman adam schiff said after the hearing that donald trump jr. that taking self-serving statements is not what they do.