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.

I'm not going to tell you I know George W. Bush intimately. I'm not going to tell you we're best friends. I'll tell you I met him on a number of occasions. You know what? George W. Bush is a very nice guy. Very funny guy. His wife is a very nice woman; I thought she was a great first lady. George [W.] Bush was the worst president in the history of the United States of America... The issue is not Bernie Sanders. The issue is the Koch brothers. The issue is who owns America.

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.

I've run for statewide office plenty of times, and people know me.

If you want to run for the United States Senate, you hire a consultant who will do polling for you, who will tell you the kinds of television ads you should run, who will tell you that most of the money you raise has got to go into TV. Raising money, and then putting that money into the hands of consultants, who then put on TV ads - that's more or less what campaigns are about. We've got to change that.

The focus, to my mind, is to make sure that Donald Trump does not become president of the United States. I think by temperament he is unqualified to be president. I think his views - you have a guy who's running for president who rejects science, doesn't even believe climate change is real, let alone wants to do something about it, wants to give hundreds of billions of dollars in tax breaks to the top two-tenths of one percent.

Real freedom must include economic security.