NATE SILVER has been called a "prodigy", a "wunderkind", and a "genius". Using his unique methodology, he was able to correctly predict every state but Indiana in the 2008 presidential election. He also got every Senate race right. That is why we here at The Economist find ourselves visiting his website, FiveThirtyEight, several times a day. This week Democracy in America talked with Mr Silver about polling, predictions and politics.