The justices moved quickly to schedule oral argument to consider the legality of the president’s signature economic initiative.

© Mark Abramson for The New York Times

A federal appeals court had reinstated the commissioner, Rebecca Kelly Slaughter, saying she was fired ‘without cause.’

© Susan Walsh/Associated Press

A federal appeals court had invalidated a centerpiece of President Trump’s economic strategy, finding that a 1977 law did not authorize the tariffs.

© Alyssa Schukar for The New York Times