Who: Statistician
Tweeter: The jury is out as to whether Nate Silver, who runs the New York Times' 538 blog, is a wizard or merely a talented statistician. No matter what, Silver clearly knows his shit. He surveys all the polls in their biased and unbiased grandeur, massages them with special formulas, and often ends up predicting election results correctly, making no one in politics happy, much of the time. Silver's Twitter feed is often surprisingly feisty and always informative.