How do we say, why do you keep voting for people who are giving more tax breaks to billionaires, who are going to send your jobs abroad, not going to let you form a union, not going to allow your kids to go to college? Why do you keep voting for these guys?

What we're also looking at, if we do not transform our energy system, is more international war and conflict as countries fight over limited natural resources, including water and land to grow their crops.

The good news is that we've seen in recent years significant reductions in the cost of solar panels and wind production. We know how significant an impact we can have by moving towards energy efficiency and transforming our transportation system. So we know what has to be done. We have to develop the political will to do it, and, as president, this would be an issue of huge concern to me.

The Postal Service is a vitally important institution for the American people. It must be saved.

I would love to have the endorsement of every progressive organization in America. We're very proud to have received recently the endorsement of MoveOn.org. We've received the endorsement Democracy for America. These are grassroots organizations representing millions of workers.

We have got to change the political culture in America. We need a political revolution. That means we are working on politics not just three weeks before an election but 365 days a year.

Democrats and progressives do well when the voter turnout is high. Republicans do well when the voter turnout is low.