It's really quite astounding to see what the science says we can actually do.

There are potentially hundreds of billion dollars, potentially more, that could be saved by moving to a clean energy system. Studies [on healthier diet] show those savings, in fact, are enough to pay the costs of creating 100% clean renewable energy.

I'm a medical doctor by training. I'm a physician, not a politician. And I'm in this as a mother on fire.

There are very complicated issues here [about NATO], and I don't want to give them short shrift.

For ISIS, the answer is to cut off their food, their water, their armaments, you know, and their funding. I don't mean literally their food and water. What I mean is cutting off their life support system.

We know that from the GI Bill after the Second World War, where Congress found that for every dollar we put in as taxpayers into free higher education for returning GIs, we got back $7 for every dollar invested. An enormous return on our money in public benefits and improved revenue.

Today, suddenly, after, what, five years, suddenly he [Donald Trump] became convinced that it's not an issue. Yesterday it was an issue. It will probably become an issue again for him. You know, the guy may have a memory problem.