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"WPE"
Amanda Carpenter reported that MSNBC has already called Pennsylvania for Obama... here's the reason why Fox News had not. (They now have...)
Michael Barone when asked by Brit Hume why they had not - was due to something called "WPE".
It stands for "within precinct error" and means the difference between the exit polls and the actual vote count.
Barone said, shockingly - "WPE is running as high as 11% in positive numbers for Obama."
Meaning exit polls mean zip... which we had been telling you all this time.