A U.S. trade court's ruling against a Trump administration tariff could further constrain the White House's ability to impose import levies, according to legal and trade experts.

The latest shift arrived this week after a federal trade court ruled that the current centerpiece of his trade strategy — a 10 percent tax on most imports from around the world — exceeded the presiden...

The Court of International Trade, in a 2-to-1 ruling, said his new bid at sweeping tariffs didn’t satisfy the trade law’s criteria.