Global warming is not just the greatest environmental challenge facing our planet - it is one of our greatest challenges of any kind.

I think that there have been a number of public figures where you start hearing commentary that is dangerous because what it starts doing is it starts dividing us up as Americans.

A political consultant, when we first started thinking about Senate race, said, "You can have one funny name. You can be 'Barack Smith.' Or you can be 'Joe Obama.' But 'Barack Obama' - that's not gonna work."

I think [ unpopular presidential candidates ] indicates, at least on the Democratic side, that we've got more work to do to strengthen our grassroots networks.

...I believe deeply that we canot solve the challenges of your time unless we solve them together - unless we perfect our union by understanding that we may have differnt stories, but we hold common hopes; that we may not look the same and we may not have come from the same place, but we all want to move in the same direction - towards a better future for our children and our grandchildren. This belief comes from my unyielding faith in the decency and generosity of the American people.

Together, we're going to finish the job we started.

We have concerns whenever we see people who have large stockpiles of weapons, or appear to be in the process of accumulating weapons and ammunition.