I know from my own experience that you've got to be ready on day one. There is just too much unpredictable threat and danger in the world today to try to just say wait, I'll get to that when I can. That is just not an acceptable approach.

It may be hard to remember how difficult it was for people to talk about HIV/AIDS back in the 1980's and because of both Ronald Reagan and Nancy Reagan - in particular Mrs Reagan - we started a national conversation, when before nobody would talk about it, nobody wanted to do anything about it. Something that I really appreciate was her very effective but low-key advocacy, but it penetrated the public conscience, and people began to say "hey we have to do something about this too.

I personally am thrilled at the numbers of people, and particularly young people who are coming to support Bernie Sanders campaign. I hope that I will be able to earn their support. They may not support me now, but I support them and we'll work together.

We have health insurance companies playing a major role in the provision of healthcare, both to the employed whose employers provide health insurance, and to those who are working but on their own are not able to afford it and their employers either don't provide it, or don't provide it at an affordable price. We are still struggling. We've made a lot of progress. Ten million Americans now have insurance who didn't have it before the Affordable Care Act, and that is a great step forward.

I think a revolution transitioning from fossil fuels to clean, renewable energy - somebody's going to be the 21st-century clean-energy superpower.

He ran a gas station down in St. Louis. No, Mahatma Gandhi was a great leader of the 20th century.

People just want to see something happen that is positive for them in their lives. If you're struggling to pay your student-loan debts, or if you've got a kid trying to go to college and don't think you're going to be able to afford it, it really matters whether you get help or not. If you don't have health care or you have insurance but the insurance company won't pay for what your doctor says you need, then what's the point of people arguing in Washington? Why don't you give me some help to fix this problem? I will work with anybody if I think we can actually produce results for people.