I think Donald Trump is totally unfit to be president of the United States. Let's not forget, this guy was one of the leaders of the so-called birther movement, which was an effort to delegitimize the presidency of the first African-American president we have ever had.

I think we should look to countries like Denmark, like Sweden and Norway, and learn from what they have accomplished for their working people.

I think the way for [Marco] Rubio to say to [Donald] Trump supporters, hey, essentially he's conned you. He's a con man. That's what they do. You pour gold people.My goodness, that's not the way to bring them in.

Please don't suggest that I think we normalize relations with Tehran tomorrow. We don't. But I would like to see us move forward, and hopefully some day that will happen.

I love music, I'm very eclectic. On my iPad I have the complete works of Ludwig van Beethoven.

I think the media and the candidates have got to talk about why the middle class is in decline and why we have massive levels of income and wealth inequality.

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?