The laws of war right now say that we can respond when our country is threatened. That is what international law says.

With the passion and the vision of the Berners [Sanders] coming into the Greens - we call it berning green - and the events that I'm going to that are being created around the country right now, it's the Bernie folks who are showing up in huge numbers along with the traditional Green. It's very powerful.

Zbigniew Brzezinski, you know, who was one of the authors of U.S. dominance, he's changed his mind, you know, and he's saying now we've got to learn to cooperate with other world powers. We are not the bully in the schoolyard here.We've got to deal with them. And that's my feeling.

All the more reason we need to stand up for our democracy now. If we're going to solve the crises that are barreling down on us, we need democracy, and our democracy needs to start with an open and inclusive debate. That doesn't mean 20 candidates. There are four candidates who are on the ballot for just about every voter in America.

I feel so bad for him [Bernie Sanders]. It's really unfortunate that he's been caught in the crossfire here.

I'm trained as a medical doctor - that's my field: I've been practicing long enough to see how extremely broken our health care system is, how broken our health is, the link between that and the environment.

We, the people, gave the marching orders to our democratically-elected officials and instructed them. We wanted out of Vietnam and we got out of Vietnam. We wanted women's right to choose and we got women's right to choose. We got the EPA, we got the Clean Air Act, Water Act, we got rights for workers in the workplace to be protected from dangers. We accomplished pretty much all of what we wanted when we had the courage of our convictions. That is the missing ingredient.