The single biggest threat that we face is a nuclear weapon or some weapon of mass destruction. What that means is that we have to be extraordinarily aggressive and vigilant in controlling nuclear proliferation.

Poorly secured nuclear material in the former Soviet Union, or secrets from a scientist in Pakistan could help build a bomb that detonates in Paris. The poppies in Afghanistan become the heroin in Berlin. The poverty and violence in Somalia breeds the terror of tomorrow.

This is something that I'm sure I'd have serious debates with my fellow Christians about. I think that the difficult thing about any religion, including Christianity, is that at some level there is a call to evangelize and prostelytize. There's the belief, certainly in some quarters, that people haven't embraced Jesus Christ as their personal savior that they're going to hell.

They say I need to be seasoned; they say I need to be stewed. They say, 'We need to boil all the hope out of him -- like us -- and then he'll be ready.'

American politics is always somewhat fluid. In this age of social media, it means that voters can swing back and forth.

I am looking forward to getting out of the bubble. I am glad that I'm leaving this place at a relatively young age, at 55. So I have the opportunity for a second maybe even a third act in a way that I think would be tougher if I were, you know, the age of some presidents when they left.

Clem (Clementa Pinckney) understood that justice grows out of recognition of ourselves, in each other.