In 2014, the Obama administration promulgated a “guidance” to America’s public schools that threatened federal investigations and litigation against schools where black students are disciplined (e.g., by suspension) more often, on a pro rata basis, than white students, on the ground that such numerical discrepancy is evidence of discrimination. Many schools responded by adopting discipline quotas, which meant in practice that after a certain number of students of a particular race had been suspended, teachers and administrators were helpless to enforce any kind of discipline in classrooms. The Obama administration is gone, thankfully, but its “guidance” has not been revoked....