A ruling against Trump would deliver his biggest legal defeat since returning to the White House. The court is considering Trump’s April 2 “Liberation Day” tariffs, which placed levies of 10% to 50% on most imports, along with duties imposed on Canada, Mexico and China in the name of addressing fentanyl trafficking.

The Supreme Court leaves Trump tariff challenge unresolved while delivering three rulings in lower-profile cases.

The timing of the court’s decision has been the subject of much speculation and anticipation. But now it may not land for at least several more weeks.

The Supreme Court signaled deep skepticism Wednesday that President Donald Trump had the authority to remove Lisa Cook from the Federal Reserve, with several conservative justices joining their liberal colleagues in posing pointed questions of the lawyer defending the president.

Get the latest news and live updates on the Trump administration as House Speaker Mike Johnson marks a U.K. milestone and the Supreme Court weighs Hawaii's 'vampire' gun law.

If the Supreme Court rules against its tariffs, the Trump administration would begin replacing them immediately, said Jamieson Greer, the United States Trade Representative.