WASHINGTON – The U.S. Supreme Court will hear arguments Wednesday over President Donald Trump’s sweeping tariffs, putting a tool at the center of his economic and foreign policy agendas squarely before the high court.

The case involves the tariffs first announced in April on almost all U.S. trading partners and the ones from February on imports from Canada, China and Mexico . Trump justified these by declaring separate national emergencies under the International Emergency Economic Powers Act.

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Earlier this year, however, two lower courts and a federal appeals court ruled that the emergency law he invoked doesn’t give him unlimited power to set tariffs . The Constitution says tariff power belongs to Congress.

Now, arguments on whether the president’s tariff

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