For months President Donald Trump has been slapping higher tariffs on practically every country’s exports to the United States, citing emergency economic powers.

U.S. appeals court judges sharply questioned on Thursday whether President Donald Trump's tariffs were justified by the president's emergency powers, as lawyers for states and businesses challenging the measures argued he exceeded his authority.

Trump's sweeping tariff agenda is at the center of a lawsuit at a federal appeals court, as the legal battle looks likely to go to the Supreme Court.