Stamina. There is a greater physical element to this job than you would think, just being able to grind it out. And I think your ability to not just mentally and emotionally, but physically be able to say, "We got this. We're going to be OK."

The law is a powerful thing but the law doesn't always change what's in people's hearts. And so all of us have an obligation to think about how we're treating other people.

So if somebody wants to build a coal-powered plant, they can; it's just that it will bankrupt them because they're going to be charged a huge sum for all that greenhouse gas that's being emitted.

I'm told there's a saying from those ancient times, kalos kai agathos, when someone or something is good and beautiful on the outside, but is also good and noble on the inside in terms of character and in terms of purpose. And I think that's a fine description of the friendship that exists between the Greek people and the American people.

We start this new year in the midst of an economic crisis unlike we have seen in our lifetime.

Women can't wait for equal pay. And I won't stop fighting to address this inequality.

I think it's important not to start drawing parallels, for example, between Theresa May, a fairly traditional conservative politician, who's now prime minister and Le Pen in France. Those aren't the same and the situation in each country is different.