I think George W. Bush has a warm, engaging personality. But, you know, the presidency is more than just a popularity contest.

There's no such thing as clean coal. It's non-existent. Theoretically, it might be possible, many years from now, to come up with a way to clean it as it's burnt. But there's not a single demonstration project in the United States. [...] Clean coal doesn't exist.

When it comes to climate, we can all make a big difference.

I think that asserting that former President Obama wasn't born in the United States was just the height of irresponsibility, of course. And Donald Trump corrected that one. There are others that have yet to be corrected.

I was in elective politics for 24 years. I've made four national races, two for president, two for vice president. I have found there are other ways to serve, and I'm enjoying them.

Judge Roberts is a brilliant lawyer, a brilliant judge. He is a very careful judge, a thoughtful judge. I would agree with what the President said earlier. He is a decent man. I think everybody who knows him likes him.

The struggle against poverty in the world and the challenge of cutting wealthy country emissions all has a single, very simple solution... Here it is: Put a price on carbon.