
Nate Cohn @Nate_Cohn
For all we know, we'll be biased toward Dems in these same spots in 2020. I'd argue the two AZ polls we've done so far were unusually strong for Biden, v other firms, at those points of the race. What if we have a Dem bias there obscured by high turnout in '18? IDK — PolitiTweet.org