(AP) — The Supreme Court struck down President Donald Trump’s far-reaching global tariffs on Friday, handing him a significant loss on an issue crucial to his economic agenda.

The 6-3 decision centers on the tariffs Trump unilaterally imposed under an emergency powers law, including the sweeping “reciprocal” tariffs levied on nearly every other country.

It’s the first major piece of Trump’s broad agenda to come squarely before the nation’s highest court, which he helped shape with the appointments of three conservative jurists in his first term.

The majority found that the Constitution “very clearly” gives Congress the power to impose taxes, which include tariffs. “The Framers did not vest any part of the taxing power in the Executive Branch,” Chief Justice John Roberts wrote.

“The tariffs at issue here may or may not be wise policy. But as a matter of text, history, and precedent, they are clearly lawful,” Justice Brett Kavanaugh wrote in the dissent.