Cockburn attempted to celebrate Labor Day by doing no work whatsoever, and he would have succeeded if his friends hadn’t rudely sent him this astonishing Politico piece about a rising source of tension within the vast anti-Trump coalition.

Progressives have been calling on Biden to take a hard line in filling out his cabinet, with groups such as Justice Democrats and Sunrise Movement demanding that he pledge to appoint ‘zero’ current or former Wall Street executives or corporate lobbyists to his administration.

But Black Democrats on Capitol Hill and K Street say that’s in direct conflict with the party’s overarching diversity goals...