It's the Democrats' same old weakness: much too much dependency on consultants and TV ads rather than mobilizing people.

We need a Democratic Party open, that is bringing working people into the party, that is bringing young people, that bringing all of the people of this country who are sick and tired of an economy that works well for the 1 percent while the middle class struggles.

Interestingly, a lot of the polling that I see is not along racial lines, but along generational lines. We are doing better and better among younger people, not so well among older people, whether they're African-American, whether they're white or whether they're Latino.

We will do well when young people, when working-class people come out. We do not do well when the voter turnout is not large. We did not do as good a job as I had wanted to bring out a large turnout.

Debating, doubting, or rejecting the basic scientific facts about climate change in the face of the overwhelming evidence and overwhelming scientific opinion will not change those facts.

If we do not get our act together and transform our energy system away from fossil fuel, there is a real question as to the quality of the planet that we are going to be leaving our children and our grandchildren.

I'm very proud that the state of Vermont banned fracking. I hope communities all over California, and all over America do the same.