The Supreme Court has agreed to hear arguments on whether the Trump administration's sweeping global tariffs are legal.
On Tuesday, it said it would review lower court decisions that found the president did not have the legal authority to enact the tariffs, which were brought in through an emergency economic powers act.
The justices said they would hear arguments in the case in the first week of November - an expedited timeline.
It will amount to the biggest test of Donald Trump's presidential authority and his signature economic policy, potentially forcing the US to refund billions in tariffs.
The Supreme Court's conservative majority has so far been amenable to temporarily instating Trump's policies, and to his requests for emergency orders. But this case will mark the court's first assessment of the legal basis for one of his administration's most far-reaching policies.
