From The New York Times article by Paul Krugman "Trump on down, the Republicans can't be serious."
For while it’s true that Mr. Trump is, fundamentally, an absurd figure, so are his rivals. If you pay attention to what any one of them is actually saying, as opposed to how he says it, you discover incoherence and extremism every bit as bad as anything Mr. Trump has to offer. And that’s not an accident: Talking nonsense is what you have to do to get anywhere in today’s Republican Party.
It has long been obvious that the conventions of political reporting and political commentary make it almost impossible to say the obvious — namely, that one of our two major parties has gone off the deep end. Or as the political analysts Thomas Mann and Norman Ornstein put it in their book “It’s Even Worse Than It Looks,” the G.O.P. has become an “insurgent outlier … unpersuaded by conventional understanding of facts, evidence, and science.” It’s a party that has no room for rational positions on many major issues.
Can Mr. Trump actually win the nomination? I have no idea. But even if he is eventually pushed aside, pay no attention to all the analyses you will read declaring a return to normal politics. That’s not going to happen; normal politics left the G.O.P. a long time ago. At most, we’ll see a return to normal hypocrisy, the kind that cloaks radical policies and contempt for evidence in conventional-sounding rhetoric. And that won’t be an improvement.