One of the main reasons we ought to re-elect President Obama is that he is still committed to constructive cooperation... He appointed Republican secretaries of defense, the Army and transportation. He appointed a vice president who ran against him in 2008.

I got a letter from 13-year-old Ryan from Belfast. Now, Ryan, if you're out in the crowd tonight, here's the answer to your question. No, as far as I know, an alien spacecraft did not crash in Roswell, New Mexico, in 1947. And, Ryan, if the United States Air Force did recover alien bodies, they didn't tell me about it, either, and I want to know.

Just because we cannot do everything for everyone does not mean we should do nothing for anyone.

Literacy is not a luxury, it is a right and a responsibility.

The earth is warming at an alarming rate, we are running out of fossil fuels, and it is long past time for us to take action to correct these problems.

When times are tough and people are frustrated and angry and hurting and uncertain, the politics of constant conflict may be good. But what is good politics does not necessarily work in the real world. What works in the real world is cooperation.

When you get asked hundreds of questions, it's not possible to remember the answer to every one.