I think if you have mandatory carbon caps combined with a trading system, much like we did with sulfur, and if you have a tax-incentive program for investing in the solutions, that there's a package there that's very, very good.

I'm going to be the nominee. It's very hard not to look at the recent polls and think that the odds are very high I'm going to be the nominee.

Bowing to the Saudi king is not an energy policy.

For most of the rise of modern medicine, the brain was a really unknown zone and was all based in guesswork. Well, that's all changing. And the opioid recovery is a very good example of the scale of change we're seeing.

Donald Trump is a very action-oriented person.

If you have depression, you are dramatically more likely to be sick. Now to say you don't need to treat depression because it's not a medical reality - when in fact it clearly affects your interaction with the entire world around you - is just frankly reactionary.

As [House] speaker, I came back, working with President Bill Clinton. We passed a very Reagan-like program: less regulation, lower taxes. Unemployment dropped to 4.2 percent. We created 11 million jobs.