NATO was formed post-World War II. We're a little bit more than a half-century old. Do we want NATO to go on for another half-century? I think that the answer is, sitting here today: I don't know. If I had to bet on it, I would say, yeah, we have to have these alliances going forward and see who's going to pay for them.

We have a problem with radical Islamism and I actually think that we could work together with Russia against this enemy. They have a worse problem than America does.

What I know is it is a disservice to those who continue to serve to think that there's going to be a civil-military breakdown because those who serve, they know who they serve. They know what their loyalties are, that's why you take an oath to the Constitution and your loyalty lies in the chain of command and your buddies. That's always been there. We are a professional military.

Why do three-quarters of NATO [countries] get away with not paying anything? They have to pay their bills.

The Republican Party is no longer the Republican Party.

There are Muslims, who are moderate Muslims. And there's more of them than there are radicalized Muslims and are using Islam in its misinterpreted ideology.

The United States should not have to intervene in every single problem around the world. The voters of this country are reacting in a very big, broad way to Mr. Trump. They are frustrated by lousy decisions made by both George W. Bush and Barack Obama. Look at the mess we have.