Supreme Court justices appeared skeptical Wednesday of the government's argument that President Trump could bypass Congress to impose tariffs on other countries by using national security as the legal...

U.S. President Donald Trump’s key tool for deploying tariffs faces a critical legal test in the Supreme Court — one which could upend his plans to realign global trade.

Trump has made tariffs a central piece of his economic and foreign policy, and has said it would be a “disaster” if the Supreme Court rules against him.