But last year there were 540,000 people, roughly, detained coming across the border illegally. Forty-five thousand of them came from countries other than Mexico, demonstrating the fact that Mexico itself now is a pathway into the United States for people all around the world, and we don't know what their intentions are.

My goal has always been to figure out how we can advance the conservative cause.

Nobody else in the world can do what we can do. And nobody else is willing to do it for altruistic reasons. I mean, we don't go into places like Iraq to grab their oil or colonize their country. We go there to deliver, as George W. Bush said, the blessings of liberty.

I can't imagine the American people voting for Hillary Clinton to serve basically the third term of Barack Obama. And I think whoever the Republican primary voters and the delegates nominate, I will support that nominee wholeheartedly against a Hillary Clinton candidacy.