I've never said that troops should be withdrawn. What I've said is, is that we've got to make sure that we secure and execute the rebuilding and reconstruction process effectively and properly, and I don't think we should have an artificial deadline when to do that.

Together, we're going to finish the job we started.

The shift to a cleaner energy economy wont happen overnight, and it will require tough choices along the way. But the debate is settled. Climate change is a fact.

I need you to go out and talk to your friends and talk to your neighbors. I want you to talk to them whether they are independent or whether they are Republican. I want you to argue with them and get in their face.

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

Without a deal [with Iran], the international sanctions regime will unravel with little ability to reimpose them. With this deal, we have the possibility of peacefully resolving a major threat to regional and international security. Without a deal, we risk even more war in the Middle East and other countries in the region would feel compelled to pursue their own nuclear programs, threatening a nuclear arms race in the most volatile region in the world.

I can think about what [Mahatma] Gandhi said or [Martin Luther] King said about violence begetting violence, and still be true to my job by asking myself the question whenever we're confronted with a situation where some may be arguing for military action: Will this actually result in America being safer, or the most lives being saved?