The trade court noted that Trump retains more limited power to impose tariffs to address trade deficits under another statute, the Trade Act of 1974. But that law restricts tariffs to 15% and only for 150 days with countries with which the United States runs big trade deficits.

That was the question in front of the federal courts that ruled against President Trump’s tariffs in the last couple days. The judges weren’t deciding whether the tariffs are good for the country but whether the president has the power to impose them all by himself.