If you think that running your economy into the ground and having to send troops in in order to prop up your only ally is leadership, then we've got a different definition of leadership.

I'm inspired by my own children, how full they make my heart. They make me want to work to make the world a little bit better. And they make me want to be a better man.

I don't look at my pension. It's not as big as yours so it doesn't take as long.

Today, more than ever before, science holds the key to our survival as a planet and our security and prosperity as a nation. It's time we once again put science at the top of our agenda and work to restore America's place as the world leader in science and technology.

The young are going to be the messengers of this continued strengthening of the diversity in America.

Our politics at its best involves us recognizing ourselves in each other. And our politics at its worst are when we see immigrants or women or blacks or gays or Mexicans as somehow separate, apart from us.

As citizens, we understand that it is not about what America may do for us. It's about what can be done by us, together.