**US President Trump's Sanctions on Cuba Deemed Illegal by Supreme Court** On January 29, 2026, President Donald Trump signed an executive order, E.O. 14380, declaring a national emergency regarding Cuba, targeting its energy supply chain. The order, effective January 30, 2026, established an unprecedented tariff mechanism designed to sever the island's access to foreign oil by penalizing supplier nations with duties on their US-bound exports. This action was taken under the International Emergency Economic Powers Act (IEEPA) and the National Emergencies Act. The order aimed to penalize third-party nations that provide oil to Cuba, with potential impacts on energy suppliers and global traders. However, on February 20, 2026, the Supreme Court of the United States of America struck down President Trump's tariffs on US imports imposed on all countries in the case of _Learning Resources Inc. v. Trump_. In a 6-3 ruling, the Justices of the court declared that the President lacks the constitutional authority to impose tariffs without congressional approval. The majority of the Justices stated that tariffs are taxes and that the Constitution of the United States expressly reserves the power of taxation to the legislature. The Justices also ruled that the International Emergency Economic Powers Act (IEEPA) does not authorize President Trump to impose sweeping, open-ended tariffs—striking down the legal foundation for a central pillar of his administration's trade strategy. In response to the Supreme Court's judgment, President Trump has faced criticism for his scurrilous attacks on the 6 Justices who ruled against his action. The judgment is binding on all authorities and persons in the United States, in line with the rule of law. The case of _Learning Resources Inc. v. Trump_ has significant implications for President Trump's administration, as the imposition of tariffs on countries that supply oil to Cuba is deemed illegal and unconstitutional due to the lack of congressional approval. Furthermore, the Executive Order issued by President Trump is also deemed illegal and unconstitutional, as it was predicated on the International Emergency Powers Act of 1977, which is not a tariff statute. The economy of Cuba has been severely impacted, with the country's electric grid power collapsing two days ago, leaving 11 million people without access to essential services.