Maybe the third time will be the charm. Columbia University obviously subscribes to the belief that Friday night is the best time to put out bad news. How else to explain the fact that, at 8 p.m. Friday, it announced that its interim president had quit? If members of the Board of Trustees hoped nobody would notice, they’re more delusional than advertised. The resignation of Dr. Katrina Armstrong is yet another bombshell development in the Trump administration’s crackdown on universities violating the civil rights of Jewish students, with Columbia a serial offender and top test case. The announcement gave no...