The speed of President Trump’s response to the Supreme Court ruling on Friday was remarkable: within hours, he had announced a brand new 15% tariff on all global imports, drawn from a different legal authority and framed as both a rebuke to the court and a continuation of his America-first economic agenda. What does this mean for trade policy, global markets, and American consumers?
The Supreme Court ruled 6-3 that Trump’s use of the International Emergency Economic Powers Act to impose sweeping tariffs was unconstitutional. The ruling required congressional approval that Trump had not sought and did not have. In response, Trump invoked Section 122 of the Trade Act of 1974 — a provision that has never been used — which allows tariffs of up to 15% for 150 days before Congress must weigh in.
For American consumers, the shift means higher costs are coming. Research shows that roughly 90% of the $130 billion in tariffs collected under the now-invalidated framework was paid by domestic businesses and households. The new 15% rate — up from the previous temporary 10% baseline — promises to extend and increase that financial burden, even with exemptions for critical minerals, metals, pharmaceuticals, and USMCA-compliant goods.
For global trade partners, the picture is deeply uncertain. The UK had agreed to a 10% rate that now seems obsolete. Germany’s Chancellor Merz called the ongoing volatility economic “poison” and announced a visit to Washington to present a joint European position. France’s President Macron praised the original Supreme Court ruling and called for trade built on reciprocity rather than executive command.
For Trump himself, the moment represents a test of how far executive trade power can stretch before it breaks. His administration vows to use the 150-day window to build lasting, legally resilient tariff policy. Whether that strategy succeeds — or meets the same fate as the IEEPA approach — will be one of the defining economic stories of his second term.
