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.

Even those who claim the Bible's inerrancy make distinctions between Scriptural edicts, sensing that some passages - the Ten Commandments, say, or a belief in Christ's divinity - are central to Christian faith, while others are more culturally specific and may be modified to accommodate modern life.

We can lose so much of what we've gained in terms of the kind of democratic freedoms and market-based economies and prosperity that we've come to take for granted.

It's the job, I think, of leaders to try to address peoples' real legitimate concerns and channel them in the most constructive ways possible.

For decades, we've been told that it doesn't make economic sense to switch to renewable energy. Today, that's no longer true.

I’m asking you to believe. Not just in my ability to bring about real change in Washington...I’m asking you to believe in yours.

We are not going to be able to rebuild Afghanistan into a Jeffersonian democracy.