I think Saudi Arabia often finances radical Islam and the teaching of hatred to the West and hatred of Americans. I think it is important that we know that. It's important that we know that there is a threat within and a threat without. I think we can stop it with more aggressive use of actual constitutional tools.

There are still people - the majority on the stage, they want to topple [Bashar] Assad. And then there will be chaos, and I think ISIS will then be in charge of Syria.

The Republican Party is an empty vessel unless we imbue it with values.

What worries me most about Trump, other than all of the other crazy things, is that I believe that he wants power and I believe from my point of view that power corrupts, and that the whole purpose of our founding fathers and America was to contain power.

Why don't we see any questions from the press? Why don't we see anybody from the media saying, 'Mr. President, it's illegal, you started it, you are performing a program that is collecting all of the phone records from all Americans, it's been declared illegal from the second highest court in the land, why don't you stop?'

As commander-in-chief, I will do whatever it takes to defend America. But in defending America, we cannot lose what America stands for.

We need to be fearful of companies that get so big that they can actually be directing policy.