The United States will continue its efforts to improve our understanding of climate change - to seek hard data, accurate models, and new ways to improve the science - and determine how best to meet these tremendous challenges.

I hope I stand for antibigotry, anti-Semitism, antiracism. This is what drives me.

We are not here to enjoy the things on earth, but to pass them around. The people who do it are the happiest people you know!

It's too much show business and too much prompting, too much artificiality, and not really debates. They're rehearsed appearances.

I try to hold my charisma in check.

The rigidity of those pledges is something I don’t like. The circumstances change and you can’t be wedded to some formula by Grover Norquist. It’s—who the hell is Grover Norquist, anyway?

Every problem that the country faces is being solved in some community by some group or some individual. The question is how to get connected so that the whole nation can solve problems. A volunteer is a person who can see what others cannot see; who can feel what most do not feel. Often, such gifted persons do not think of themselves as volunteers, but as citizens - citizens in the fullest sense; partners in civilization.