Remember the lessons of history - if we don't learn from history, we're bound to repeat it.

It took Jimmy Carter to give us Ronald Reagan.

Donald [Trump] is a charming person. He can be fun. He can make you laugh. But he can turn on you. And get nasty and personal and vicious.

I think President Obama is the most radical president this nation's ever seen. And in particular, I think he is a true believer in government control of the economy and of our everyday lives. In my judgment, we are facing what I consider to be the epic battle of our generation, quite literally the battle over whether we remain a free market nation.

If you want to beat Donald Trump, you know, one of the clearest indications of who can beat Trump is Donald spends every waking moment attacking me. He doesn't attack any other candidates, because his campaign views us as the only real threat to him.

You know flexibility is a good thing but it shouldn't - you shouldn't be flexible on core principles.

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.'