We need a much better understanding of the climate before making policy choices that would impose substantial economic costs on our Nation.

About 65 percent of Republicans believe that Donald Trump is not the best candidate to go head to head with Hillary Clinton.

What we saw with both Donald Trump and Marco Rubio, that their response, whenever you point to anything in their record, is just to yell, "Liar, liar, liar," and to get very personal and to make direct character attacks. And my approach, from the very beginning of this President's campaign, starting a year ago in 2015, is that I will not respond in kind. I do not intend to insult any of the candidates.

Carli Fiorina thinks the answer for Social Security and Medicare is...zero-based budgeting! Christ. People of a certain age are all banging their heads on the table right now.

Every candidate is going to come to you and say they are the most conservative person that ever lived.

It is very simple to be likeable in Washington. You just go along to get along. You just do what your leadership wants.

I'm a constitutionalist. You know, does faith matter to me? Sure. But the beauty of the Constitution, the beauty of the First Amendment, it protects everyone's faith.