Nate Silver explains FiveThirtyEight's Senate forecasting model

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Nate Silver found it necessary to explain the intricacies of the FiveThirtyEight Senate forecasting model to give readers a better understanding of how it works. Interestingly, Silver also saw merit for criticizing Sam Wang's Senate modeling in the process:

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So he's calling out a guy for making his error bars too narrow??

Silver seems to have a fair point. At least in 2010, Wang apparently structured his model in a way that almost completely ruled out results that actually happened, and it wasn't even a partisan bias on Wang's part from what I can tell, since he overestimated Angle, a Republican, while underestimating the GOP's chances in the House in the same year.