Administration officials are warning of calamity if courts remove the sweeping tariffs President Donald Trump imposed on emergency grounds. Trump has used the International Emergency Economic Powers Act to place tariffs on goods from countries worldwide.

The president has crowed about the billions of dollars collected so far from tariffs. That money could be at risk if the White House loses the legal battle.

President Trump on Friday said any curtailing of his authority to impose broad tariffs on America's trading partners would have serious negative consequences for the US economy.