Progress is the product of human agency. Things get better because we make them better. Things go wrong when we get too comfortable, when we fail to take risks or seize opportunities.

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.

People are consuming the news that is comfortable for them, not necessarily the news that is real or that they need to know.

The U.S. cannot go it alone simply when it is convenient.

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

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

I would rather be alone and a loud voice for action than be silent.