The Supreme Court’s landmark tariff decision is the latest defeat ‘piercing President Trump’s seeming invincibility’

President Donald Trump’s trade war isn’t over, despite the Supreme Court striking down his global tariffs, but the legal setback adds to the growing wall of resistance.

The last two months represent a stunning reversal from the first year of his second term when lawmakers, CEOs, foreign governments, and the high court itself deferred to the president—even as he sought to tear down the existing world order.

The 6-3 ruling against Trump’s levies under the International Emergency Economic Powers Act earned the six justices in the majority a severe tongue lashing. In a press briefing on Friday, he said they were a “disgrace to our nation,” adding that they’re “fools and lapdogs for the RINOs and the radical left Democrats.”

He combined his insults with bravado over his ability to enact a fresh set of tariffs under separate laws, and he quickly followed through by imposing a 10% global duty that he hiked to 15% just a day later.

“Still, the importance of this judgment is another step in piercing President Trump’s seeming invincibility,” wrote Kurt Campbell, a longtime diplomat and national security official who is also chairman of the Asia Group.

“We have seen a series of ...