Obama’s polling analysts, [Sasha] Issenberg writes, wanted to test their internal polls against [Nate] Silver’s model. And so — in an unusual step for the closely-held campaign, and for the analyst, who was then running his own website, FiveThirtyEight.com — the Obama campaign offered Silver access to thousands of its own internal polls, on the condition Silver sign a confidentiality agreement, which he did. [cont.]
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