In a 6-3 ruling late last month, Justice Amy Coney Barrett minced no words when it came to so-called “universal injunctions,” lower-court rulings that extended far beyond that court’s jurisdiction. “It is unnecessary to consider whether Congress has constrained the Judiciary; what matters is how the Judiciary may constrain the Executive,” Barrett wrote in the decision. “That goes for judges, too,” Barrett added. “When a court concludes that the Executive Branch has acted unlawfully, the answer is not for the court to exceed its power, too.” That decision, by the way, did not decide the merits of the case in...