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...