On health care, your freedom to choose your own doctor, without Obamacare.

What is deemed "unlikeable" in Washington is actually standing up to Washington and saying no, saying "The emperor has no clothes," saying "We made promises to the people who elected us; let's do that."

Today, the global warming alarmists are the equivalent of the flat-Earthers. It used to be [that] it is accepted scientific wisdom the Earth is flat, and this heretic named Galileo was branded a denier.

For anyone who doesn't believe that Donald Trump is the best candidate to go head to head with Hillary Clinton in November, and that's about 70 percent of Republicans nationwide who don't think Donald Trump is the right guy, our [President's] campaign is the only campaign that has beaten Donald Trump and that can beat Donald Trump.

I think data is incredibly powerful for understanding what people are thinking and for allocating resources.

I treat him [Donald Trump] as an entertainer. I laugh it off. It's like going to the circus and seeing the acrobats and the dancing bears. He's willing to say things that are patently false.

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