Focus on something that stirs your soul, it's hard to excel at anything that you don't love.

It's in our interest to continue with the Paris Agreement and to deal with climate change as the real threat it actually is.

There are no cookie-cutter solutions that you can apply from one circumstance to another. They're different. Our interests, as implicated, are different. The tools we have at our disposal are different.

We also have begun to assess with the Ukrainians the scope of their larger security assistance requirements. We have had teams out making that assessment with the Ukrainians. And we have already provided various forms of equipment and support to Ukraine.

One can't erase the tremendous burden of apartheid in 10 years, 20 years, I believe, even 30 years.

The youth thing never really, from my vantage point, slowed me down. I think the harder audience for me to gain acceptance from was the career diplomatic corps that worked with and for me in the Africa Bureau.

If we are to garner sustained U.S. domestic support for future trade agreements, we have to make sure those Americans who have suffered as a consequence of past agreements have an effective social safety net, adjustment assistance, opportunities for retraining and new job creation that enables all Americans to thrive.