Nate Cohn @Nate_Cohn
@kkondik @jon_m_rob @AlanIAbramowitz there's typically a lot. sure seems like there's less. but in our october polling, the 4% of validated '16 voters who said they 'don't know' backed biden by at two-to-one margin, so not sure what you do that. maybe it's only a point or two of bias but it could be there — PolitiTweet.org