"It was hard for me to believe that you were entirely serious about that socialist question. I did think it might be useful to point out that it wasn't under me that we started buying a bunch of shares of banks. It wasn't on my watch. And it wasn't on my watch that we passed a massive new entitlement - the prescription drug plan without a source of funding. And so I think it's important just to note when you start hearing folks throw these words around that we've actually been operating in a way that has been entirely consistent with free-market principles and that some of the same folks who are throwing the word socialist around can't say the same."  President Obama.

Source:  Gallup.

The top four most liberal US Senators in 2007 per the National Journal, and their voting scores (economic, social, foreign and overall):