Nate Silver invented PECOTA, a system that predicts the future performance of baseball players that’s used by teams and baseball geeks alike. Now he’s turned his attention to political forecasting, and he’s found he’s pretty good at that, too. Silver’s site, FiveThirtyEight.com (named after the number of electors in the electoral college), relies on polls, demographics, and statistical analysis to predict who is going to win the 2008 Presidential election. I sat down with him for a quick chat yesterday at the Democratic National Convention; watch the video here. [Nate’s on the right.]