We will keep the promise of Social Security by taking the responsible steps to strengthen it - not by turning it over to Wall Street.

The biggest threat, when it comes to climate change and pollution, isn't going to come from us because we only have 300 million people. It's going to come from China with over 1 billion people and India with over 1 billion people.

[Fall of the Berlin Wall] is a reminder that the commitment of the United States, to Europe is enduring and it's rooted in the values we share; our commitment to democracy, our commitment to rule of law, our commitment to the dignity of all people in our own countries and around the world.

If you look at sort of how politics has divided itself here in this country, the big divide right now is between urban areas, which have become increasingly Democratic, and rural or exurban areas that feel as if they're being ignored.

A little reminder to those who don't back Obama and gay marriage. It's probably cause you're gay.

It's hard to anticipate. I can tell you what I'm feeling right now is that I'm busier than I expected these last two weeks. A great deal of emotion around the people that I've worked with and the gratitude I feel for the sacrifices they've made on behalf of the American people, but also on behalf of me personally.

It still puts burden on some troops of ours who are there [in Afghanistan and Iraq] as advisors and facilitators.