The US Supreme Court will hear arguments Wednesday on whether a wide swath of Donald Trump's tariffs are lawful, in a landmark case that could uphold -- or upend -- the president's economic agenda.

Officials may be forced to refund $90 billion in already collected revenue. If the Supreme Court rules that President Donald Trump's sweeping tariffs are illegal, customs officials may be forced to go ...

The justices face a so-called legitimacy dilemma as they deal with a tricky legal dispute and a president who has made clear he would view defeat as a personal insult. By Ann E. Marimow Reporting from ...