Both the American people and nations that censor the internet should understand that our government is committed to helping promote internet freedom.

I think what Secretary Ash Carter is seeing, and I'm glad he is, is that we got to get NATO back working for the common defense. We've got to do more to support our partners in NATO, and we have to send a very clear message to Putin that this kind of belligerence, that this kind of testing of boundaries will have to be responded to. The best way to do that is to put more armor in, put more money from the Europeans in so they're actually contributing more to their own defense.

When people say, well, they disapprove, I'd like to know what the specifics are, because sometimes - and the president [Barack Obama] has admitted this - they may not feel like he's really explaining and understanding the emotion behind some of these fears [about Iran]. And that's a perfectly legitimate question for people to ask. But if you look at the results of where we are, I think there are some things I agree with and some things I don't agree with, and I think that's absolutely fair game.

I don't want to get into some sort of back-and-forth on insults because that just drags everybody down.

I don't want to get into an insult fight with Donald Trump.

Recently in Washington, unfortunately, we have seen examples of the wrong kind of leadership -- when politicians choose scorched earth over common ground, when they operate in what I call the 'evidence-free zone,' with ideology trumping everything else.

I do agree that in particular, Turkey and the Gulf nations have got to make up their minds. Are they going to stand with us against this kind of jihadi radicalism or not? And there are many ways of doing it. They can provide forces. They can provide resources. But they need to be absolutely clear about where they stand.