The thing that should most concern us is a shift in American foreign policy. We have had a bipartisan belief in American foreign policy based on the post-World War II institutions that believed in democratic global world, which Russia and the Soviet Union was often seen as hostile to. And most Republicans and Democrats have always basically believed in this world order. Donald Trump and Vladimir Putin and maybe Marine Le Pen do not agree with this basic structure of the world.

My colleague Ross Douthat wrote that any time you give Donald Trump the benefit of the doubt, he always lets you down.

I think globalization has been really good for America.

It's very hard to find an evangelical person under 45, let alone on some of the Christian college campuses, who has any tolerance for Donald Trump.

If Donald Trump is just tweeting about a union guy, then he's just being the bully we have seen. But if he uses the power of the presidency to back up some of those tweets and he's really, really coming down with a hammer on people he doesn't like using the power of the presidency, then we're seeing something very new and very different.

Trump has picked the more extreme versions of all Republicans so far, the more aggressive. And I think the thing to watch out for is, I could totally paint a scenario where Trump runs an authoritarian regime. I can totally paint a scenario where he has no control over his own government.

You figure out, what is the crucial issue facing the country right now? And for Trump, it was that the global economy and the international world order were failing regular people.