In an overnight ruling blocking the Trump administration from deporting a group of Venezuelans, the justices ignored some of their protocols.There are sculptures of tortoises scattered around the Supreme Court grounds. They symbolize, the court’s website says, “the slow and steady pace of justice.” But the court can move fast when it wants to, busting through protocols and conventions. It did so around 1 a.m. on Saturday, blocking the Trump administration from deporting a group of Venezuelan migrants accused of being gang members under a rarely invoked 18th-century wartime law. The court’s unsigned, one-paragraph order was extraordinary in many ways....