The scientists actually have suggested things that ambitious. There are good studies coming out of Stanford, Mark Jacobson for example and others, showing how it can be done. But it really requires a sense of emergency. It cannot be done unless we really understand that literally our lives are on the line.

Jack Geiger, for example, was a leader of that movement. He was part of Physicians for Social Responsibility, which was kind of one of the ways that I worked my way into social activism in medicine.

The clock is ticking. It's time to stand up. Reject the lesser evil and that propaganda. Reject the lesser evil. Fight for the greater good like our lives depend on it, because they do. We're running out of time. It's time to stand up.

The specific trigger for me was when the President [Barack Obama] put Medicare and Social Security on the chopping block. Why I got into the race - it just seemed unconscionable that the Democrats were leading the charge.

We call for a bailout for an entire generation that is basically held hostage by unpayable student-loan debt.

When you actually integrate the health savings from an improved food system, eliminating food deserts, ensuring that everyone can afford a healthy diet, that you don't have to be sort of a person of substantial means in order to have access to healthy food, there are remarkable health improvements.

You don't do that while you're being paid by taxpayers to do a very difficult and full-time job, and you also do not bring Clinton Foundation interests into the domain of the secretary of state, and you do not give preferred access to your own personal clients.