A lot of liberals think all the Trump voters are a part of the alt right, neo Nazi camp, which is not true. That's a tiny, tiny slice.

There's no higher honor, in my estimation, than being asked to serve in the White House.

Apparently, the fossil-fuel industry's strategy is to convince the American people that we should just burn all the way through the last of our oil and coal reserves.

There would be a cost for dumping carbon into our atmosphere and a cap on total emissions. The government must make a clear and firm decision - terminating the idea in our society it is free to pump infinite amounts of carbon into the air. Once that happens, private capital will flow even more aggressively into developing and deploying the alternative, less-polluting technologies.

The Russians have had and continue to have an active program to undermine American society.

I've had a chance to meet some of my civil rights heroes and, more recently, members of the young generation around [Barack] Obama, people in their teens and twenties who were determined to make history and who were too idealistic to think that what they were trying to do might be impossible. They proved that visionary pragmatism can win over the majority. That comes from a particular place in your heart that generation Y is offering America. They just can't afford to be naive now, in terms of the ferocity of the opposition.

I'm learning and changing all the time, and I expect to continue doing so my entire life.