In this day and age, the U.S. and Europe do not have the luxury of focusing solely on a single region.

The problem is, Hamas is using force to try to extort progress on its political objectives.

There are plenty of meetings, receptions, dinners, and so if you are [at the U.N.] any length of time, and I was there for four and a half years, you formed pretty significant relationships with people from all over the world. And that's important to the work you do. If you're trying to rally the General Assembly to vote for something that matters to the United States, those personal relationships count.

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 notion that I had become a political lightning rod was painful for me to experience.

Legislation that would withhold funding for the United Nations is fundamentally flawed in concept and practice, sets us back, is self-defeating, and doesn't work.

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