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Video: Nate Silver's predictions, and the week on the trail

Another week, another debate.

Another week, another debate. And another installment of our Campaign Calculus series, which juxtaposes snapshots of the campaign with Nate Silver's daily predictions from his FiveThirtyEight blog over at The New York Times.

We've got everything from Paul Ryan's soup kitchen photo op to Mitt Romney's botched Libya  attack in the last debate, to President Obama poling fun at the Al Smith dinner. And Nate helps us make sense of what it all means for the race.