Trump Slaps 25% Tariff on High-End AI Chips in National Security Push. U.S. President Donald Trump has imposed a 25% tariff on certain high-performance AI chips, including Nvidia's H200 processor and AMD's MI325X, under a new national security order from the White House. The move follows a nine-month investigation under the Trade Expansion Act and targets advanced semiconductors that meet specific performance thresholds. The administration says the goal is to boost domestic chip production and cut U.S. dependence on overseas manufacturers, particularly in Taiwan. According to the White House, the tariffs will be narrowly applied and will not affect chips used in U.S. data centers, startups, consumer devices, or public sector applications. The Commerce Secretary will also have wide authority to grant exemptions. Shares of Nvidia and AMD dipped slightly after the announcement. While broader semiconductor tariffs remain possible, Wednesday's decision signals a more targeted approach for now as Trump continues his aggressive push to reshape global supply chains.