>> and it is clear that mueller saw it as an ironclad roadblock. that even if he found it he would not be able to say it outloud. >> he said it would have been uncushional. he could not do it, could not even accuse him of this. >> again, i get the outthere -- that part of what he was saying, i just didn't feel it. i got the constitutional idea of it, but i just wonder if you came out and said but for, how much would that have changed the conversation around impeachment. >> they're beating up on barr, look, i have looked, barr was careful in his senate testimony not to fully -- i think he could get out of a perjury trap.