ISIS is gaining strength because the perception is that they're winning. And President [Barack] Obama fuels that perception.

In my view, republican primary debates ought to be moderated by people who would vote in a primary.

Theirs is the party that ... responds to the death of Americans at Benghazi by asking, What difference does it make?

I will do whatever I can to defeat Hillary Clinton.

I think what Republicans want is someone who will stand up and lead, who will take on the great challenges of the day, who will make the case that the path we're on isn't working; that the Obama-economy is a disaster, that Obamacare is a trainwreck, that our constitutional rights are under assault and that we need to restore America's leadership in the world.

I am not in the habit of supporting people who attack my wife and attack my father.

I have never supported legalization, and I do not intend to support legalization.