The Supreme Court’s ruling in the tariffs case has been hailed as a devastating blow for President Trump and a triumph for the rule of law. Even though Trump had warned that a loss in this case “would literally destroy the United States of America,” the Court broke from its pattern of siding with him. Prominent media outlets have described the decision as a “resounding … smackdown,” a “declaration of independence” by the justices, maybe even “the most important Supreme Court decision this century.” The tariffs ruling is indeed a smackdown. And Trump obviously doesn’t like to lose. But his critics’ celebrations and his own furious response risk obscuring a deeper dynamic at play: Both the White House and the Court stand to gain from the decision. To see why, first consider that the tariffs ruling is unlikely to do significant damage to the Trump administration or the Republican Party legally, politically, or otherwise. As a matter of law, the opinion breaks hardly any new ground. Notwithstanding the decision’s “blockbuster” trappings, the holding of the …