Whether our forebears were strangers who crossed the Atlantic or the Pacific or the Rio Grande, we are here only because this country welcomed them in and taught them that to be an American is about something more than what we look like, or what our last names are, or how we worship.

The president [Barack Obama] laid out his vision for foreign policy in a way that we hadn't heard before. And it could be summed up, I think, in two words - realistic idealism.

The brain is a body part too; we just know less about it.

I'm not sure we have the right strategy in Afghanistan. Let me think this over for a few months.

All of us - we should do everything we can to make sure this country lives up to our children's expectations.

If people, whether they are conservative or liberal, left or right, are unwilling to compromise and engage in the democratic process, and are taking absolutist views, and demonizing opponents, then democracy will break down.

For more than four decades, the Libyan people have been ruled by a tyrant - Moammar Gaddafi. He has denied his people freedom, exploited their wealth, murdered opponents at home and abroad, and terrorized innocent people around the world - including Americans who were killed by Libyan agents.