The Supreme Court struck down President Donald Trump's sweeping tariffs on Friday in a 6-3 vote. The justices ruled that the tariffs - which were imposed by a series of executive orders - exceeded presidential powers under a 1977 law that gives the president authority to regulate commerce only in the case of international emergencies. The ruling takes away a leverage power tool by Trump," says Lori Wallach, director of the Rethink Trade program at the American Economic Liberties Project. He's furious about it, because a court that's been otherwise willing to expand his authority endlessly drew a line."Trump called the ruling a disgrace" and responded Friday by announcing a new 10% global tariff - which he increased to 15% Saturday.