U.S. President Donald Trump arrives at the White House on November 2, 2025 in Washington, DC. Trump spent the weekend at his Mar-a-Lago club in Palm Beach, Florida.

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Robert AlexanderShane Croucher

By Robert Alexander and Shane Croucher

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U.S. President Donald Trump warned of America's "ruination" if the Supreme Court rules against him on tariffs.

The Supreme Court will hear oral arguments on November 5 in two suits brought by small businesses challenging Trump's authority to impose tariffs, the very foundation of his aggressive trade policy. They argue the power to set tariffs rests with Congress, not the president.

Writing on Truth Social, Trump said on Sunday that the tariffs ruling would be "one of the most important in the History of the Country."

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"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'," Trump wrote. "In a true sense, we would be defenseless!"

Why It Matters

A ruling against Trump could restrict presidential authority to impose tariffs and limit future administrations’ flexibility in trade negotiations, while a ruling in his favor would affirm broad executive control over U.S. trade policy, potentially redefining the scope of presidential power for decades to come.

The upcoming Supreme Court case over Trump’s use of tariffs carries implications regarding how much power presidents have to act unilaterally on economic matters without congressional approval—a question that could reshape the balance between the executive and legislative branches.

U.S. President Donald Trump arrives at the White House on November 2, 2025 in Washington, DC. Trump spent the weekend at his Mar-a-Lago club in Palm Beach, Florida.

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What To Know

"If a President was not able to quickly and nimbly use the power of Tariffs, we would be defenseless, leading perhaps even to the ruination of our Nation," Trump wrote. "The only people fighting us are Foreign Countries who for years have taken advantage of us, those who hate our Country and, the Democrats, because our numbers are insurmountably good."

He added: "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 Supreme Court is scheduled to hear Learning Resources, Inc. v. Trump and V.O.S. Selections, Inc. v. Trump on November 5, 2025, two consolidated cases challenging the president’s authority to impose tariffs without congressional approval.

The plaintiffs—small business importers and several states—argue that Trump overstepped his powers under the International Emergency Economic Powers Act (IEEPA), which they say does not grant the president independent authority to set trade barriers.

The plaintiffs argue that the Constitution gives Congress—not the president—the authority to impose tariffs.

Trump’s legal team argues that presidents must retain broad discretion to act swiftly on trade and national security matters.

This is a developing article. Updates to follow.

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