That's according to democrat strategist and expert on the matter James Carville: http://mikesright.wordpress.com/2012...ally-clueless/
So, if we take the roughly 150 million registered voters in the US x 47% x 80% you get about 56 million sheep and cattle who can vote according to an expert. Is this surprising to anyone? Note what Carville is saying: these people can be easily swayed just by simple baiting with silly issues--not matters of substance. I would say this episode of Mythbusters is "confirmed" that most democrats don't think rationally, intuitively or pragmatically but emotionally with sensing and feeling and can easily be lead to support issues that go against rational thinking.