Washington: US President Donald Trump warned that a potential Supreme Court decision limiting his authority to impose tariffs would undermine national security, as the country awaits a ruling on the legality of his tariff policies.

The warning comes as the Supreme Court continues to review challenges to Trump's wide-ranging use of tariffs, a process that began on November 5.

The scrutiny has intensified, with several businesses and Democratic-led states approaching the US Court of International Trade, arguing that tariff powers lie with Congress, not the presidency.

Against this backdrop, Trump said on social media that "The biggest threat in history to United States National Security would be a negative decision on Tariffs by the US Supreme Court," cautioning that such a ruling would

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