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.

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. President Donald Trump's trade tariffs are meant to boost domestic manufacturing. But in the chocolate industry, they're doing the opposite: ramping up the cost of importing already-pricey cocoa and hurting the competitiveness of local factories versus Canadian and Mexican outfits that supply the U.