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.

The Trump administration asked the U.S. Court of Appeals for the Federal Circuit to review a trade court's decision invalidating President Trump's 10% tariffs.

A panel of appeals court judges on Thursday voiced deep skepticism with the Trump administration's attempt to justify sweeping tariffs based on a national emergency. As the clock ticks down to President Donald Trump's Aug.