The U.S. Supreme Court has agreed to decide the legality of Donald Trump's sweeping global tariffs, setting up a major test of one of the Republican president's boldest assertions of executive power that has been central to his economic and trade agenda.

The justices took up the Justice Department's appeal of a lower court's ruling that Trump overstepped his authority in imposing most of his tariffs under a federal law meant for emergencies. The court swiftly acted after the administration asked it last week to review the case, which implicates trillions of dollars in customs duties over the next decade.

The court, which begins its next nine-month term on Oct. 6, placed the case on a fast track on Tuesday, scheduling oral arguments for the first week of November.

The U.S. Court of Appea

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