President Donald Trump 's sweeping tariffs will be at the heart of a legal drama on Thursday when a federal appeals court weighs his authority to levy them via executive action.

The full panel of judges on the United States Court of Appeals for the Federal Circuit will hear arguments in the Trump administration's appeal of a May ruling by the U.S. Court of International Trade, which found that the president enacted his tari ff plans unconstitutionally. The hearing is the next phase of a legal battle over the tariffs that appears destined to wind up at the Supreme Court.

Trump's power to enact tariffs at center of the dispute

The International Emergency Economic Powers Act, a 1977 law that Trump has cited for his sweeping reciprocal tariffs, is at the center of the legal ch

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