The arguments underscored the financial stakes for U.S. importers as the Trump administration prepares to impose higher rates without the explicit approval of Congress.

The U.S. Constitution gives the power to impose taxes — including tariffs — to Congress. But lawmakers have gradually relinquished power over trade policy to the White House. And Trump has made the most of the power vacuum, raising the average U.S. tariff to more than 18%, highest since 1934, according to the Budget Lab at Yale University.

President Donald Trump has signed an executive order to impose his threatened 50% tariffs on Brazil WASHINGTON -- President Donald Trump signed an executive order Wednesday to impose his threatened 50% tariffs on Brazil,

Trump hit Brazil with 50 percent tariffs. The U.S. imposed 50 percent tariffs on Brazil yesterday, the highest levy President Trump has applied to another country in his current t