Announcing a withdrawal date, that was wrong. The Taliban may not have watches, but they do have calendars.

Iran's nuclearization is the greatest single national security threat America faces.

It kills me not to be there, not to be in the White House doing what needs to be done.

You look at that Democratic debate. I had to laugh at what I saw Barack Obama do. I mean, in one week, he went from saying he is going to sit down for tea with our enemies, but then he's going to bomb our allies. I mean, he's gone from Jane Fonda to Dr. Strangelove in one week.

I have to tell you with regards to global warming that that's something, which, you're right, the scientists haven't entirely resolved, but no question about one thing, it's getting warmer, and a lot of good reasons for us to use less energy, to use it more efficiently and to develop sources here in this country that could allow us to be more independent of foreign sources.

We respect and honor very deeply those people who decide to serve their country in the military. But we certainly don't denigrate people who choose a different course, particularly when we have an all-volunteer army.

I disagree with the Supreme Court's decision and I agree with the dissent. What the court did not do on its last day in session, I will do on my first day if elected president of the United States, and that is I will act to repeal ObamaCare.