This is not some distant problem of the future. This is a problem that is affecting Americans right now. Whether it means increased flooding, greater vulnerability to drought, more severe wildfires - all these things are having an impact on Americans as we speak.

This is not class warfare. It’s math.

I believe in term limits for presidents because I think that there is no doubt I'm a better president now than I was when I start. I would argue that I am the best president I've ever been over the last year or two. My team is more effective than it's ever been.But what is also true is that number one, this is grueling.

So if somebody wants to build a coal-powered plant, they can; it's just that it will bankrupt them because they're going to be charged a huge sum for all that greenhouse gas that's being emitted.

Winter came and the city [Chicago] turned monochrome -- black trees against gray sky above white earth. Night now fell in midafternoon, especially when the snowstorms rolled in, boundless prairie storms that set the sky close to the ground, the city lights reflected against the clouds

"The Donald" is not really a plans guy.

I think sometimes Europe may take for granted the extraordinary progress that's been made over the last 40, 50 years. I recognize that sometimes there is great frustration that arises out of the euro zone or out of the EU.