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.

Since I've had a career, my hair has been more or less professional.

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.

The Russians are clearly already engaged in a proxy war against the government of Ukraine. And that is something that we and the rest of the world have actively condemned and sanctioned Russia already heavily for, particularly the United States, as we have imposed now meaningful, tough sanctions in critical sectors, including the defense sector, the financial sector, and the energy sector.

Iran's economy is now shrinking by 1 percent a year. Its oil production is down 40 percent.

Once you've learned to study in a bathing suit on the grass with muscled men throwing frisbees over your head, you can accomplish almost anything.

If you're trying to get something done, there will always be people who don't want to see you get something done, or who have a stake in the status quo. And if they approach that through ad hominem criticism of you, you've got to have enough confidence and thickness of skin to be able to endure.