There are war-torn countries, people full of poverty, who still voted, 60, 70 percent. If here in the United States of America, we voted at 60 percent, 70 percent, it would transform our politics.

One of the best investments we can make in a child’s life is high-quality early education.

Stamina. There is a greater physical element to this job than you would think, just being able to grind it out. And I think your ability to not just mentally and emotionally, but physically be able to say, "We got this. We're going to be OK."

There are problems that just end up being really hard and by definition the only problems that come to my desk are the ones that nobody else can solve.

Yes, this is hard. But there should be no question that the United States of America is stepping up to the plate. We recognize our role in creating this problem; we embrace our responsibility to combat it. We will do our part, and we will help developing nations do theirs. But we can only succeed in combating climate change if we are joined in this effort by every nation - developed and developing alike. Nobody gets a pass.

Winston Churchill used to say that we, Americans, try every other option before we finally do the right thing. After everything else is exhausted we eventually do the right thing and I think that's true for Congress as well. And it's important for Americans to remember that politics has always been messy.

The Supreme Court nominations [example]. I mean, the fact that Mitch McConnell, the leader of the Republicans, was able to just stop a nomination almost a year before the next election and really not pay a political price for it, that's a sign that the incentives for politicians in this town to be so sharply partisan have gotten so outta hand that we're weakening ourselves.