What is driving Harris’s troubling lack of union support (if the polls are to be believed)? While some media reports have suggested that it may be motivated by racism and sexism within labor’s ranks, I would be surprised if it is any worse than the general population of voters (and unions tend to promote higher tolerance and reduce gender and racial pay gaps).

Another line of thought outlined in a provocative article by Eric Levitz at Vox (paywalled, but worth $5) argues that “the Democrats’ pro-union strategy has been a bust.”