Nate Silver has been quite successful at predicting the outcomes of U.S. elections in the past, something which is described in his book The Signal and the Noise. The book contains some descriptions of the model used, and a blog post of his describes the model used for the 2014 midterm election. These descriptions are more aimed towards the more general public, and are not very specific in terms of what the statistical model actually is (more than just conceptually).
My question is: does anyone know of any more statistically oriented descriptions of the types of model he has used? Be it scientific papers, blog posts, presentations, replications, etc. His book is very interesting, and I would like to learn what type of model and estimation methods we are talking about here.
Edit: Since someone has voted to close, let me clarify what I am asking. Can someone provide a reference to a description of the prediction model(s) used by Nate Silver, which contains a statistical rather than conceptual description? This does not have to be a published paper by Silver himself, but blog posts (or papers) by others are fine as well.