That may prevent us from getting a deal done, It is there to be had. Whether ultimately Iran can seize that opportunity - we will have to wait and see, but it is not for lack of trying on our part.

I'm suspicious of too much certainty in the pursuit of understanding just because I think people are limited in their understanding.

And then you've got President Clinton who made the case as only he can. After he spoke, somebody sent out a tweet- they said, you should appoint him secretary of explaining stuff. I like that- secretary of explaining stuff. Although, I have to admit, it didn't really say stuff. I cleaned that up a little bit.

I know there are problems that I say to myself, If maybe I was a little more gifted I might have been able to solve. But that's not because I believe what I did was a mistake. It's that maybe it required the talents of a Lincoln.

I didn't have a perfect model, but I wanted to try to blend my own personal reflections and experiences with this broader canvas to see how a lot of the narratives we have about economy and foreign policy got stuck. Because we have these categories of liberal, conservative, free marketer, open government - all these stereotypes about our politics and the categories we try to put things in are inadequate to this sort of complex, ambiguous, sometimes contradictory experience we have as ordinary people and that I have as an elected official.

The War on Drugs has been an utter failure. We need to rethink and decriminalize our marijuana laws.

Our relationship with the European Union, which has done so much to promote stability, stimulate economic growth, and foster the spread of democratic values and ideals across the continent and beyond.