Without regard to whether some place is wealthy or poor, everybody should have the chance at clean air and clean water.

I think that America has to stand with democracy.

Focusing your life solely on making a buck shows a certain poverty of ambition. It asks too little of yourself. Because it's only when you hitch your wagon to something larger than yourself that you realize your true potential.

The greatest threat to U.S. and global security is no longer a nuclear exchange between nations, but nuclear terrorism by violent extremists and nuclear proliferation to an increasing number of states.

There is enormous continuity beneath the day-to-day news that makes America that indispensable nation when it comes to maintaining order and promoting prosperity around the world.

I have nothing to hide. I enjoy being myself. I'm not going to change who I am just because it's Halloween.

In a global economy where the most valuable skill you can sell is your knowledge, a good education is no longer just a pathway to opportunity - it is a prerequisite.