Now we're in the midst of not just advocating for change, not just calling for change - we're doing the grinding, sometimes frustrating work of delivering change - inch by inch, day by day.

If you have health care, my plan will lower your premiums. If you don't, you'll be able to get the same kind of coverage that members of Congress give themselves.

I don't buy the hype when everybody is saying how wonderful things are and how great I am, and I don't get too down when people say, "This is a disaster and he's done for."

It is moments like these that force us to try harder, and dig deeper, and to discover gifts we never knew we had - to find the greatness that lies within each of us.

Over more than a decade, Iran had moved ahead with its nuclear program. And before the deal, it had installed nearly 20,000 centrifuges that could enrich uranium for a nuclear bomb.

Alongside my own deep personal faith, I am a follower, as well, of our civic religion. I am a big believer in the separation of church and state.

We're up against the conventional thinking that says your ability to lead as president comes from longevity in Washington or proximity to the White House. But we know that real leadership is about candor and judgment and the ability to rally Americans from all walks of life around a common purpose, a higher purpose.