Donald Trump beat Jeb Bush and beat Hillary Clinton. And when everyone thinks of Donald Trump that's pretty impressive.
William KristolI think the whole dynamic is different. Whereas in [Barack] Obama's case, even though there was no incumbent, he was able to run against eight years of Bush-Cheney and a Republican Congress, and everyone was tired of everything. He was able to benefit from that.
William KristolMitt Romney has to convince the American public that they need to do something they're not usually inclined to do - replace a sitting president with a challenger. And unlike in 1980 and 1992, when the public was persuaded to do just that, the incumbent president has not been weakened by a primary opponent.
William Kristol