In the United States, identity politics has fractured the left into a series of identity groups that are home to its most energetic political activists. It has in many respects lost touch with the one identity group that used to be its largest constituency, the white working class. This has spawned the rise of a populist right that feels its own identity to be under threat, abetted by a president whose personal vanity is tied to the degree of anger and polarization he can stoke.
