Every chance at destabilizing [Bashar] Assad... the bombing campaign causes a flood of refugees into Jordan, there's already half a million in Jordan. I think a bombing campaign - I think it's hard to argue that a U.S. bombing campaign is going to cause less refugees. And I think it causes more refugees and more of a humanitarian disaster. I think it causes, or allows, the risk of Israel being attacked with a gas attack to go up, if we attack Assad. So there's all kinds of bad things.

When I asked the president [Barack Obama], can you kill an American on American soil, it should have been an easy answer. It's an easy question. It should have been a resounding and unequivocal no. The president's response, he hasn't killed anyone yet.

Republicans who criticize the use of two languages, I think, make a great mistake.

We still need to secure our southern border. The other thing I would say is we need to secure who visits us in the country.

Let's say tomorrow that there was a president, that we elected a president that eliminated the bulk collection of data. Let's just say it happened. What do you think would happen? People are like 'the sky would fall. We would be overrun with jihadists.' Maybe we could rely on the Constitution. Maybe we could get warrants. ... If you make the warrant specific, there's no limit to what you can get through a warrant.

So if we announce we're going to have a no-fly zone, and others have said this. Hillary Clinton is also for it. It is a recipe for disaster. It's a recipe for World War III. We need to confront Russia from a position of strength, but we don't need to confront Russia from a point of recklessness that would lead to war.

Al Qaeda has been placed on the run, but not destroyed.