I think that at a certain stage those early ambitions burn away, partly because you achieve something, you get something done, you get some notoriety. And then the particularities of who you are and what your deepest commitments are begin expressing themselves. You're not just chasing the idea of "me" being important, but you, rather, are chasing a particular passion.

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.

We have to focus on how do we ensure the economy works for everybody, and not just a few.

The more we can encourage entrepreneurship, particularly for young people, the more they have hope. That requires some reforms in these [African] governments: rooting out corruption, increased transparency and how government operates, making sure that regulations are not designed just to advantage elites, but are allowing people who have a good idea to get out there and get things done.

Although there are some parallels to the problems that we're seeing now and what we say back in the '30s, no period is exactly the same. For us to simply recreate what existed back in the '30s in the 21st century, I think would be missing the boat. We've gotta come up with solutions that are true to our times and true to this moment. And that's gonna be our job. I think the basic principle that government has a role to play in kick starting an economy that has ground to a halt is sound.

But you see, a rich country like America can perhaps afford to be stupid.

When it comes to preventing Iran from obtaining a nuclear weapon, I will take no options off the table. ... That includes all elements of American power: a political effort aimed at isolating Iran, a diplomatic effort to sustain our coalition and ensure that the Iranian program is monitored, an economic effort that imposes crippling sanctions and, yes, a military effort to be prepared for any contingency.