In science, if the last 50 years were the age of physics, the next 50 years will be the age of biology.

It is pretty hard to talk about responsibility unless you have exercised it yourself.

It's important that the American people understand that President has proposed and passed this stimulus plan not as the end-all and be-all to our economic woes but as our bridge over troubled water until we get the finance system, the banking system working again.

When we make college more affordable, we make the American dream more achievable.

Putin wants to reestablish Russian greatness, not as the Cold War, but in 19th century empire terms.

The great thing about not being president anymore is I can say whatever I want, about anything. Of course [now], nobody really cares what I say. And now I have the worst of all worlds -- my wife has become the secretary of state, so no one really cares what I say -- unless I mess up.

You can't blame the administration and the Republicans for taking us back to deficits, for spending the Social Security surplus and assaulting the environment. That's what they promised to do in the last election.