." >> i remember him waving it around like neville chamberlain getting off the plane in munich.at the time i think a lot of us thought that it wasn't quite worth the paper it was printed on. i think we're finding out ultimately that donald trump's leverage on the republican party, apart from his popularity, which is quite significant, 28 to 30% in most national polls, a lot of his leverage is based on the fact that if he goes rogue, he throws the election right to hillary clinton, presuming she is the nominee. >> in a story published earlier today in "the washington post," saying twice, "i will never leave the race," which does that put the gop establishment, concerned about what this potentially means in 2016, not only for the presidency but for key house and senate races? >> it puts them in a really difficult position. one gets the sense, over the last week or so, apart from predictions of his demise, which have been foolish, i don't think this man is going to implode anytime soon and leave the race, over the last week, however, a lot of these statements, particularly the musl