Does weaker Democratic polling among Black voters signal lower Black turnout?
Core argument: Since 1980, the racial turnout gap between white and Black voters has tracked with the share of Black registered voters backing Democrats in pre-election polls, suggesting that when Black voters do not support Democrats, they tend not to vote.
Looking back over the last few decades, there’s a clear relationship between the racial turnout gap — the difference between white and Black turnout — and the proportion of Black registered voters who back Democrats in pre-election polls since 1980. Or put differently: When Black voters don’t support Democrats, they tend not to vote. It’s possible that the Black voters who back Mr. Trump in the polls today will ultimately show up for him next November. But for now, when I see Mr. Biden’s share among Black voters slip into the 60s and 70s in the polls, I mostly see yet another decline in the Black share of the electorate, at least “if the election were held today.” If there’s any good news for Mr. Biden here, it’s that the election is still 14 months away.

