I think that there is a bipartisan consensus that's incorrect that we should have the whole world be in NATO. For example, if we had Ukraine and Georgia in NATO - and this is something McCain and the other neocons have advocated for - we would be at war now because Russia has invaded both of them.

How much liberty do with want to give up for a false sense of security?

I'm a Reagan conservative. Reagan did negotiate with the Soviets. But you have to negotiate from a position of strength.

When we toppled [Muammar] Gadhafi in Libya, I think that was a mistake. I think ISIS grew stronger, we had a failed state, and we were more at risk.

There comes a time, there comes a time in the history of nations when fear and complacency allow power to accumulate and liberty and privacy to suffer. That time is now and I will not let the Patriot Act, the most unpatriotic of acts go unchallenged.

To me, there is no greater threat than our debt. I'm the only fiscal conservative on the stage because I'm willing to hold the line on all spending.

2007 was a long time ago, and events do change over long periods of time.