"In any crass political calculation, drilling for oil will always win more votes than putting a price on carbon. But if I recall what I was taught in fifth-grade American government class, we elect presidents to do more than crass political calculations."

"Nowhere has the political power of coal been more obvious than in presidential campaigns."

"One thing you can say about nuclear power: the people who believe it is the silver bullet for America's energy problems never give up."

"Bloomberg is famously impatient with beltway politics and believes that to get anything done you need to work from the ground up."

"I like the challenge of trying different things and wondering whether it's going to work or whether I'm going to fall flat on my face."

"I think I could go away tomorrow. I've already accomplished something. It's such a selfish business that sometimes I get sick of myself."

"Work harder on yourself than you do on your job."

"The United States strongly condemns the illegal disclosure of classified information. It puts people's lives in danger, threatens our national security, and undermines our efforts to work with other countries to solve shared problems."