I have a range, and I'd much rather do things the nice way than the hard way, but sometimes you have to use all the tools at your disposal.

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

Well, Nigeria has played a constructive role in peacekeeping in various parts of West Africa. But unless and until Nigeria itself is democratic and respects human rights, it too may well be a source of much greater instability as political repression limits the ability of the people of Nigeria to achieve their full potential.

I'm not watching any TV shows, frankly.

Be who you are. If you spend all of your time worrying about how people view you, you will not be either faithful to yourself or effective in what you're trying to do.

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.

You can't sit on the sidelines and read your iPhone and be on social media and expect everything to be cool. You have to be part of this.