In a significant legal development, US Court Blocks Trump’s Sweeping Import Tariffs in Landmark Ruling. The US Court of International Trade in Manhattan has halted the majority of President Donald Trump’s sweeping import tariffs, known as the “Liberation Day” tariffs. The court ruled that the President exceeded his authority under the International Emergency Economic Powers Act (IEEPA) by imposing broad tariffs on countries with large trade surpluses against the United States.