The United States really only accounts for about 3 percent of the economic engagement with Russia. Europe is 40 percent, and so Europe's contribution to this pressure is far more than symbolic. It's very practical. And that's one of the many reasons why we have worked hard to remain in close coordination with our European partners.

If you want change, you have to make it. If we want progress we have to drive it.

One of the things I love about negotiations is that you have to be able to play it like an orchestra, different instruments for different circumstances. There's sweetness, and encouragement, and cajoling. There's pressure, there's drama, there's ultimatums.

I was very happy in my job at the United Nations.

Americans are hungry for change both at home and in our relations with the rest of the world.

I am blunt sometimes; I am diplomatic sometimes; I am all things in between. Abrasive, you know, I guess it's in the eye of the beholder.

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