A federal trade court on Thursday upheld President Donald Trump‘s elimination of the “de minimis” exemption, which allowed low-value goods to be imported to the U.S. tax free.

Trump, a major proponent of tariffs and other forms of protectionism, celebrated the continued closure of the loophole, which he claims has cost the U.S. billions of dollars in uncollected import-tax revenue.

Attorneys for the plaintiff, a Michigan-based auto-parts distributor, did not immediately respond to CNBC’s request for comment on the ruling.

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