Islam has always been part of America

I think there are hard-liners inside of Iran that think it is the right thing to do to oppose us, to seek to destroy Israel, to cause havoc in places like Syria or Yemen or Lebanon, if they don't change at all, we're still better off having the deal.

American leadership is not simply a matter of going it alone and bearing all of the burden ourselves.

I find it hard to believe that my God would consign four-fifths of the world to hell. I can't imagine that my God would allow some little Hindu kid in India who never interacts with the Christian faith to somehow burn for all eternity. That's just not part of my religious makeup.

I know that there are those who disagree with the overwhelming scientific evidence on climate change. But here's the thing -- even if you doubt the evidence, providing incentives for energy-efficien cy and clean energy are the right thing to do for our future -- because the nation that leads the clean energy economy will be the nation that leads the global economy. And America must be that nation.

If there's one thing I would like to see, it'd be for us to be able to price the cost of carbon emissions.

I don't want to make promises, not knowing what the situation's going to be three or four years out.