We have to know who we are and know what we believe.

President Obama is perhaps the smartest person I've ever worked with.

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

Syria is a civil war. Syria began as a popular uprising, just like the other experiences in the Arab Spring, with a repressive government that responded by basically killing the protesters. It's not a genocide, it's a war, and there's a difference. Genocide is a preplanned attack on people because of who they are. This is a interstate conflict.

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.

Governing is different than campaigning, and that comes with a whole different level of responsibility.

We are safer if there are not nuclear arsenals around the planet that can be utilized, stolen, sold to terrorists and others who would do harm.