Every candidate running for president has got to answer the following very simple question: At a time when we need to address the planetary crisis of climate change, and transform our energy system away from fossil fuels and into energy efficiency and sustainability, should we continue to give $135 billion in tax breaks and subsidies over the next decade to fossil fuel companies?

People are hungry, and they're hurting and they're very, very worried about their children. Will their kids ever pay off their student debt? Will their kids ever get a decent-paying job? I think Democrats have got to be running a grass-roots campaign - mobilizing people and being prepared to take on the 1 percent with an agenda that speaks to the needs of ordinary workers.

If you looked at Jeb Bush's campaign, it's more than just money. It's the nature of the candidate and the message and all that stuff.

Social Security is a promise that we cannot and must not break.

Of course their [Cuba's] economy is terrible, but they have Health Care and education.

I believe what I call common sense gun reform. Plus, a revolution in mental health, making sure that if people are having a nervous breakdown, or are suicidal, or homicidal, they get the care they need when they need it. I think the vast majority of the American people can support and agenda composed of those features.

You want to know the way to raise money? Put a transaction fee on Wall Street, so maybe we can curb some of the speculation and raise some money.