mueller trump-proof, in effect? >> i think the president does know. frankly, the fact it looks as if he started to do it in the summer and was rebuffed by his own legal counsel and others probably indicates if he wasn't going to do it then, he certainly shouldn't do it now. i hope that he lets the investigation take its course. i have confidence in the fbi, i have confidence in the special counsel, certainly robert mueller, so let's see where it goes. >> our other friend niccole wallace is fond of saying that you and mr. corker had a drink of the truth serum known as not having to run for reelection. after you're gone, though, there is a core population, i believe, in this country, kind of the sensible core as there is in your party, in the democratic party, that wants to know we're going to be okay, wants to know the country is going to hold