President Donald Trump has launched an urgent appeal to the Supreme Court, seeking to safeguard much of the tariff regime he has negotiated about imports from key trade partners and warning their removal could trigger what his administration has termed an “economic catastrophe.” Trump’s demand, framed in both public statements and legal filings, comes amid mounting uncertainty over the future of his tariff authority, following rulings by federal courts that much of his actions were, in fact, as illegal as they appeared on their face to analysts and constitutional scholars .

At the heart of the dispute is the International Emergency Economic Powers Act (IEEPA) , which Trump leveraged to impose “Liberation Day” tariffs, including new levies on China, Mexico, and Canada earlier this year

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