As a nuclear power - as the only nuclear power to have used a nuclear weapon - the United States has a moral responsibility to act.

I know that there are those who disagree with the overwhelming scientific evidence on climate change. But here's the thing -- even if you doubt the evidence, providing incentives for energy-efficien cy and clean energy are the right thing to do for our future -- because the nation that leads the clean energy economy will be the nation that leads the global economy. And America must be that nation.

Yesterday, John McCain actually said that if he's president that he'll take on, and I quote, 'the old boys network in Washington.' Now I'm not making this up. This is somebody who's been in Congress for twenty-six years, who put seven of the most powerful Washington lobbyists in charge of his campaign. And now he tells us that he's the one who's gonna' to take on the old boys network. The old boys network? In the McCain campaign that's called a staff meeting. Come, on!

When you're out of work and you can't buy a home or you've lost your home and you're worried about paying your bills, then you become more worried about what other folks are doing. And sometimes that organizes itself around kind of a tribal attitude, and issues of race become more prominent.

We should be more modest in our belief that we can impose democracy on a country through military force.

I am willing to work with anybody who wants to have a serious conversation about our fiscal future. We're not going to do this under the threat of blowing up the entire economy. I will not negotiate over Congress' responsibility to pay the bills that have already been racked up. I don't know how I can be more clear about this.

Everybody potentially can make the claim that we should all be treated fairly.