The issue of climate change is one that we ignore at our own peril

I believe in term limits for presidents because I think that there is no doubt I'm a better president now than I was when I start.

The United States has to go through structural reforms in terms of improving our education system or revamping our infrastructure or, you know, looking at some regulations that weren't properly controlling excesses on Wall Street.

Moammar Gadhafi had more American blood on his hands than any individual other than Osama bin Laden.

You don't need to see my birth certificate, or my college records, or my legal writings, or... anything.

If you run you stand a chance of losing, but if you don't run you've already lost.

Don't get cynical. Don't ever think you can't make a difference.