US President Donald Trump on Sunday described the upcoming Supreme Court case on tariffs as one of the most significant in American history, saying the ruling would determine the country's economic strength and national security.
The top court justices are set to hear the case on November 5.
In a post on Truth Social, Trump wrote, “Next week’s Case on Tariffs is one of the most important in the History of the Country. If a President is not allowed to use Tariffs, we will be at a major disadvantage against all other Countries throughout the World, especially the ‘Majors.’ In a true sense, we would be defenceless!”
The Republican leader argued that tariffs during his presidency had helped the United States achieve “Great Wealth and National Security.”
He added, “The Stock Market has hit All Time Highs many times during my short time in Office, with virtually No Inflation, and National Security that is second to none.”
Citing the United States’ recent trade negotiations with China and other countries, Trump said tariff leverage was instrumental in securing “fair and sustainable deals.”
“If a President was not able to quickly and nimbly use the power of Tariffs, we would be defenceless, leading perhaps even to the ruination of our Nation,” Trump wrote, claiming opposition to tariffs came from “Foreign Countries who for years have taken advantage of us, those who hate our Country and, the Democrats, because our numbers are insurmountably good.”
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Trump said he would not personally attend the Supreme Court session, explaining, “I will not be going to the Court on Wednesday in that I do not want to distract from the importance of this Decision.”
He continued, “It will be, in my opinion, one of the most important and consequential Decisions ever made by the United States Supreme Court. If we win, we will be the Richest, Most Secure Country anywhere in the World, BY FAR. If we lose, our Country could be reduced to almost Third World status — Pray to God that that doesn’t happen!”
The case will examine whether Trump had the legal authority to impose tariffs by invoking the International Emergency Economic Powers Act (IEEPA). Trump used those powers to raise import tariffs to as high as 50 per cent on major trading partners such as India and Brazil, and up to 145 per cent on China earlier this year.
A ruling against the president would not automatically revoke the tariffs currently in place, but could significantly reshape Trump’s economic policy.
Data from US Customs and Border Protection, showed that by September 23, American companies had paid nearly $90 billion in disputed IEEPA tariffs — more than half of all tariff revenue collected in fiscal year 2025, which closed on September 30.

