It is manifestly in the interest of the United States to deal with the very real threat that climate change poses. And that's why President Obama has worked so hard to reduce our own emissions and to lead internationally in forging the Paris climate agreement.

I spend every day up at the United Nations where I have to interact with 192 other countries. I know how well the United States is viewed.

President Obama has got the most moderate temperament.

What we have done is when the threat has been directed at the United States, i.e., the terrorist threat from ISIL or Al-Qaeda in Syria, is to go after them.

The notion that I had become a political lightning rod was painful for me to experience.

President Obama is funny, he's thoughtful, he's challenging, he's fun to work with - and it's been an extraordinary privilege.

I don't worry about how folks want to characterize me.