A little rusty, but as yet serviceable — that, in the shell of a nut, seems to be the Supreme Court’s view of the Alien Enemies Act, described by these columns as a “226-Year-Old Sword.” President Trump is wielding the law to deport Venezuelan gang members. The Nine on Monday cleared the way for the law’s application, for now, despite efforts by a lower court judge to halt the deportations. The dispute, though, is far from settled with Monday’s decision.