For months President Donald Trump has been slapping higher tariffs on practically every country’s exports to the United States, citing emergency economic powers.

President Donald Trump‘s sweeping tariffs will be at the heart of a legal drama on Thursday when a federal appeals court weighs his authority to levy them via executive action. The full panel of judges on the United States Court of Appeals for the Federal Circuit will hear arguments in the Trump administration’s appeal of a May

The arguments underscored the financial stakes for U.S. importers as the Trump administration prepares to impose higher rates without the explicit approval of Congress.