There are only two ways to have a middle class in your country: either you have highly skilled manufacturing jobs, or you have a highly skilled, well trained, knowledge-based workforce. In other words, college.

We need a national renewable energy goal. Such a goal, sometimes called a renewable energy standard (RES), would spell out what percentage of our power America plans to get from renewable sources.

Audacity is the currency for authoritarians.

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.

Nobody can come and be involved in the #LoveArmy unless they have a heart.

The green economy should not just be about reclaiming throw-away stuff. It should be about reclaiming thrown-away communities. It should not just be about recycling things to give them a second life. We should also be gathering up people and giving them a second chance.

Donald Trump's a hell of a performer, he's a hell of an entertainer. If you put him on and let him say his crazy stuff, you're going to get a lot of viewers. If you take him off and have some sober discussion about what's going on in Syria, you're going to lose 80 percent of your audience.