Everything we've done has been designed to make sure that we address that number one priority. That's what the sanctions regime was all about. That's how we were able to mobilize the international community, including some folks that we are not particularly close to, to abide by these sanctions. That's how these crippling sanctions came about, was because we [USA] were able to gain global consensus that Iran having a nuclear weapon would be a problem for everybody.

One of the things I think the next president has to do is to stop fanning people's fears. If we spend all our time feeding the American people fear and conflict and division, then they become fearful and conflicted and divided. And if we feed them hope and we feed them reason and tolerance, then they will become tolerant and reasonable and hopeful.

We are running out of time

One of the best parts of the holiday season is spending time with the special people in your life.

So don't get cynical. Cynicism didn't put a man on the moon. Cynicism has never won a war, or cured a disease, or built a business, or fed a young mind. Cynicism is a choice. And hope will always be a better choice.

We may never understand what leads anybody to terrorize their fellow human beings. Such violence, such evil is senseless. It's beyond reason.

In America, one of our challenges, historically, is that we have very low voting rates, even during presidential elections.