My powers of empathy, my ability to reach into another's heart, cannot penetrate the blank stares of those who would murder innocents with abstract, serene satisfaction.

Ultimately, if you think about all the youth that everybody has mentioned here in Africa, if everybody is raising living standards to the point where everybody has got a car and everybody has got air conditioning, and everybody has got a big house, well, the planet will boil over - unless we find new ways of producing energy.

We didn't become the most prosperous country in the world just by rewarding greed and recklessness. We didn't come this far by letting the special interests run wild. We didn't do it just by gambling and chasing paper profits on Wall Street. We built this country by making things, by producing goods we could sell.

I'm not the strapping young Muslim socialist that I used to be.

I think Ronald Reagan changed the trajectory of America in a way that Richard Nixon did not and in a way that Bill Clinton did not. He put us on a fundamentally different path because the country was ready for it.

History doesn't always move in a straight line. Sometimes it zigs and zags.

Number one, it is important that we fix the legal immigration system, because right now we've got a backlog that means years for people to apply legally. And what's worse is, we keep on increasing the fees, so that if you've got a hard working immigrant family, they've got to hire a lawyer; they've got to pay thousands of dollars in fees. They just can't afford it. And it's discriminatory against people who have good character, we should want in this country, but don't have the money. So we've got to fix that.