Arizona has been close in national polls despite being a reliably red state. NeverTrumper Jeff Flake may have had something to do with it or possibly the McCain controversy. Either way, that is beginning to change.

Arizona doesn't much look like a battleground in this Reuters/Ipsos poll taken from September 2nd through September 15th. Trump receives 46% to Clinton's 39%. The poll surveyed 467 likely voters.

Indeed Nate Silver doesn't seem to think it's a battleground anymore. He's now rated Arizona a solid Trump state, giving him a 75.6% chance of winning it.

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