The American free market system is the greatest engine for prosperity and opportunity that the world has ever seen. Freedom works.

The one thing that might have stopped San Bernardino, that might have stopped 9/11 would have been stricter controls on those who came here.

The thing is, is that every terrorist attack we've had since 9/11 has been legal immigration.

In a Republican primary every candidate is going to come in front of you and say I'm the most conservative guy that ever lived. Goshdarnit, whodidily, I'm conservative. You know what, talk is cheap. The word tells us you shall know them by their fruits ... Look every candidate in the eye and say 'Don't talk, show me.'

Marco [Rubio] has opposed at every point increased security - border security for those who come to our country.

He has attempted to muddy the waters, but I think anyone that watched the battle that we had - you know, there was a time for choosing, as Ronald Reagan put it, where there was a battle over amnesty. And some chose, like Sen. Marco Rubio, to stand with Barack Obama and Chuck Schumer and support a massive amnesty plan.

Republican party leaders have been worrying about the damage a [Donald] Trump nomination could do to the party, but also what might happen if he left the GOP and took his supporters with him. But Trump said he would stay a Republican and do everything in his power to beat Hillary Clinton.