This is the defining issue of our time. This is a make-or-break moment for the middle class and for all those who are fighting to get into the middle class.

I'm inspired by the people I meet in my travels--hearing their stories, seeing the hardships they overcome, their fundamental optimism and decency. I'm inspired by the love people have for their children. And I'm inspired by my own children, how full they make my heart. They make me want to work to make the world a little bit better. And they make me want to be a better man.

Now that Iran's actions have been verified, it can begin to receive relief from certain nuclear sanctions and gain access to its own money that had been frozen.

In fact, the best thing we could do on taxes for all Americans is to simplify the individual tax code. This will be a tough job, but members of both parties have expressed an interest in doing this, and I am prepared to join them.

Higher minimum wages, full-employment programs, early-childhood education: Those kinds of programs are, by design, universal, but by definition, because they are helping folks who are in the worst economic situations, are most likely to disproportionately impact and benefit African Americans. They also have the benefit of being sellable to a majority of the body politic.

I began feeling the way I imagine an actor or athlete must feel when, after years of commitment to a particular dream...he realizes that he's gone just about as far as talent or fortune will take him. The dream will not happen, and he now faces the choice of accepting this fact like a grownup and moving on to more sensible pursuits, or refusing the truth and ending up bitter, quarrelsome, and slightly pathetic.

As I've said many times, the nuclear deal was never intended to resolve all of our differences with Iran. But still, engaging directly with the Iranian government on a sustained basis for the first time in decades has created a unique opportunity, a window, to try to resolve important issues.