Remember the box fight: You start as a southpaw, you go back to fighting as a right-handed fighter.

I like serving America.

I'm standing up for the U.S. But it's hard when Russians don't have any respect for the current leadership.

What do you do when you get out of the military, you stop serving? There are 26 presidents who served in the military. More than half of our presidents... that means that you stop being an American?

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.

I saw the relation with Russia as necessary to the U.S., for the interests of the U.S. We worked very closely with them on the Sochi Olympics. We were working closely with them on the Iranian nuclear deal.

Nobody wanted Jeb Bush, nobody wants Hillary Clinton.