The biggest threat that we face right now is not a nuclear missile coming over the skies. It's in a suitcase. This is why the issue of nuclear proliferation is so important. It is the - the biggest threat to the United States is a terrorist getting their hands on nuclear weapons.

Let's remember that our leadership is defined not just by our defence against threats, but by the enormous opportunities to do good and promote understanding.

I was always amused that people were either skeptical or surprised that I would choose a Hillary Clinton as a secretary of state. To my mind, having somebody smart, tough, capable with her own stature, who could travel around the world and command the stage, was a huge asset.

Who cares if it's a campaign strategy, and who are other people to say it's ridiculous? I'm not gay, but I strongly support gay marriage. What if someone told you you couldn't marry the one you love? I think it's about time! Let people who love each other that are the same sex get married. They deserve the right to be happy also.

When you've got little kids, and you're tucking them in. When you open a door and they're in their pajamas and they're, you know, wrestling with you and asking you, you know, to read to them and stuff, [The white House] starts feeling like home pretty quick. Not to mention having a mother-in-law upstairs, and the dog, and now two.

Every major world religion has identified marriage as between a man and a woman.

We want our children to live in an America that isn't burdened by debt, that isn't weakened by inequality, that isn't threatened by the destructive power of a warming planet.