Shortly before Friday deadline for the tariffs beginning, Trump said he would enter into a 90-day negotiating period with Mexico, one of the nation’s largest trading partners, with the current 25% tariff rates staying in place, down from the 30% he had threatened earlier.

Members of the 11-judge panel of the US Court of Appeals for the Federal Circuit in Washington appeared unconvinced by the Trump administration’s insistence that the president could impose tariffs without congressional approval.

For months President Donald Trump has been slapping higher tariffs on practically every country’s exports to the United States, citing emergency economic powers. Now, just as he’s about to enact a new round of tariffs,