Nate Silver @NateSilver538
And... Arizona's is now the tipping-point state in our polling average. Biden's lead there (+4.7) is slightly larger than in PA (+4.3) or FL(+4.1). WI (+6.9), MI (+6.5) and MN (+6.0) are polling ahead of the tipping point, NC (+1.6) behind it. https://t.co/nWUo9X5F4y https://t.co/T8qa9B28E8 — PolitiTweet.org