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.

We want our children to live in an America that isn't burdened by debt, that isn't weakened by inequality, that isn't threatened by the destructive power of a warming planet.

American politics is always somewhat fluid. In this age of social media, it means that voters can swing back and forth.

As long as countries like China keep going all in on clean energy, so must we.

As I reflect back on what's worked for me in this [presidential] office it's been that I've gotten people who maybe didn't believe in the process to get engaged. Ironically, I've even gotten the other side that maybe didn't believe in the process to get engaged.

I think every case is different. Every situation is different. People come on the F.B.I.'s radar screen for a variety of reasons at a variety of times.

In a global economy where the most valuable skill you can sell is your knowledge, a good education is no longer just a pathway to opportunity - it is a prerequisite.