A panel of federal judges on Wednesday blocked President Trump from imposing some of his steepest tariffs on China and other U.S. trading partners, finding in two cases that he vastly overstepped his ability to issue those expansive duties under federal law.

The ruling, by the U.S. Court of International Trade, delivered an early yet significant setback to Mr. Trump in his campaign to strike a series of agreements that reorient the nation’s trading relationships, setting up a legal fight that could soon reach the Supreme Court.

This is a developing story. Check back for updates.