The bottom line is this - whereas Iran was steadily expanding its nuclear program, we have now cut off every single path that Iran could have used to build a bomb.

There are gonna be a core set of values that shouldn't be up for debate. Should be our north star.

I would have I think made a bigger mistake if I had said, "Eh, chemical weapons. That doesn't really change my calculus." I think it was important for me as president of the United States to send a message that in fact there is something different about chemical weapons [in Syria].

I will never forget that the only reason I'm standing here today is because somebody, somewhere stood up for me when it was risky. Stood up when it was hard. Stood up when it wasn't popular. And because that somebody stood up, a few more stood up. And then a few thousand stood up. And then a few million stood up. And standing up, with courage and clear purpose, they somehow managed to change the world.

We have to be successful at the cutting-edge industries of the future like Twitter. But we also have always been a country that makes stuff.

I will sign a universal health-care bill into law by the end of my first term as president that will cover every American and cut the cost of a typical family’s premium by up to $2,500 a year.

This is a core principle of my presidency - if you threaten America, you will find no safe haven.