President Trump’s top trade and manufacturing adviser called the White House’s solar tariffs “wildly successful,” despite a loophole that threatens hundreds of U.S. jobs.

Failure to rescind a Section 201 tariff exemption on bifacial, or two-sided, solar panels led to a flood of imports, undercutting U.S. manufacturers, sources say. “Hundreds of U.S. jobs are at stake,” an administration source told the Washington Examiner in July.