Litigation over President Trump’s International Emergency Economic Powers Act tariffs could move to the Supreme Court as soon as this week as the administration seeks to reverse a series of decisions declaring them illegal, but a trade lawyer says even a ruling striking down the tariffs could leave major uncertainties for importers who have already paid the duties. “That would be a tremendous headache,” Lenny Feldman, managing partner at the law firm Sandler, Travis & Rosenberg, told Inside U.S. Trade...