President Donald Trump has asked the US Supreme Court to overturn a lower court decision that found many of his sweeping tariffs were illegal.
In a petition filed late on Wednesday, the administration asked the justices to quickly intervene to rule that the president has the power to impose such import taxes on foreign nations.
A divided US Court of Appeals for the Federal Circuit last week ruled 7-4 that the tariffs Trump brought in through an emergency economic powers act did not fall within the president's mandate and that setting levies was "a core Congressional power".
The case could upend Trump's economic and foreign policy agenda and force the US to refund billions in tariffs.
Trump had justified the tariffs under the International Emergency Economic Powers Act (IEEPA), which gives the president the power to act against "unusual and extraordinary" threats.
