Every single one of you has something you're good at. Every single one of you has something to offer. And you have a responsibility to yourself to discover what that is. That's the opportunity an education can provide.

I actually believe that we need missile defense, because of Iran and North Korea and the potential for them to obtain or to launch nuclear weapons, but I also believe that, when we are only spending a few hundred million dollars on nuclear proliferation, then we're making a mistake.

When you're a candidate and you say something that is inaccurate or controversial, it has less impact than it does when you're president of the United States. Everybody around the world's paying attention. Markets move. National security issues require a level of precision in order to make sure that you don't make mistakes.

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.

There's a reason why the NRA's not here. They're just down the street. And since this is the main reason they exist, you'd think that they'd be prepared to have a debate with a president.

In the course of a healthy debate, we prioritize different goals, and the different means of reaching them. But without some common baseline of facts, without a willingness to admit new information and concede that your opponent might be making a fair point, and that science and reason matter - then we're going to keep talking past each other, and we'll make common ground and compromise impossible.

Because our right to worship freely and safely, that right was denied to Christians in Charleston, South Carolina, and that was denied Jews in Kansas City, and that was denied Muslims in Chapel Hill, and Sikhs in Oak Creek. They had rights too. Our right to peaceful assembly, that right was robbed from movie goers in Aurora and Lafayette.