Nobody's tried to touch my hair in like, in decades.

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.

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.

The United States share of the African market it's very small, it's only about 8 percent.

There is not an inherent contradiction between a Ukraine that has longstanding historic and cultural ties to Russia, and a modern Ukraine that wants to integrate more closely with Europe.

I've been very lucky to have had a supportive family, a great education, enormous opportunity and challenge.

I have no regrets whatsoever that I have acted in a way to advance my country's interests