No one ever expect me to get in the race. They didn't think I would get on the debate stage. I did. They didn't think I'd do well in New Hampshire. I finished second. And so we went to South Carolina. In a short period of time later, two weeks ago people in South Carolina had no clue who I was.

Let me just suggest to everybody, and I hear - last February [2015], I said we needed to have people on the ground in a coalition with Europe and our allies. This is not going to get done just by working with the Sunnis. And it is not going to get done if we just embed a few people.

I would only go to Syria to destroy ISIS. I would not use U.S. troops to depose Assad. But I would support the rebels there. It's okay to support those people who share your view. But for the United States to be embroiled in a civil war in Syria against [Bashr] Assad I think is a big mistake.

I don't accept that. I really don't care - I'm going to be like one of these deniers - I don't care what the polls say.

A great power has to have the discipline not only to go when necessary but to know when not to go. Getting involved in ethnic, religious civil wars is a recipe for disaster.

The single biggest way to stop the drug crisis is to educate people on the fact that if you do it, it's probably going to kill you or it's going to ruin your life. So why don't we all work together to stop that?

What people really want to know from their doctor is, are you going to make me feel better? And what they really want to know from a president are, are you going to give me some security when it comes to my work? Because if I'm not working, my family is in trouble. And when I am working, the fact of the matter is, my whole family is doing better.