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...

For Trump, when the US Court of International Trade invalidated his global tariffs, his key trade policy—which relies on imposing tariffs to supposedly drive more manufacturing into the US—was put at ...