Tariffs Rippling Through Supply Chains

Washington is shifting from broad tariffs to product-by-product pressure, aiming new duties at chips and medicines that touch China-linked supply chains. (whitehouse.gov) In January, the White House said it imposed a 25% tariff on certain advanced computing chips, naming Nvidia H200 and AMD MI325X products, under a Section 232 national security action on semiconductors. The proclamation said broader semiconductor tariffs could follow after negotiations. (whitehouse.gov; federalregister.gov) The semiconductor action followed a Commerce Department investigation completed on December 22, 2025, which found chip imports threatened U.S. national security because domestic capacity could not meet demand. The White House tied the move to defense systems, radar, communications, missiles and drones. (whitehouse.gov) Medicines are now in the same lane. Commerce opened a Section 232 investigation on pharmaceutical imports on April 1, 2025, and the White House issued a proclamation on April 2, 2026 after receiving that report. (federalregister.gov; federalregister.gov) The White House said the pharmaceutical action imposed a 100% tariff on patented pharmaceutical products and ingredients, with duties taking effect in 120 days for larger companies and 180 days for smaller ones. The investigation covered finished drugs, active pharmaceutical ingredients, key starting materials and medical countermeasures. (whitehouse.gov; federalregister.gov) That narrower approach hits the way Asian manufacturing now works. A chip, battery part or drug ingredient can be made in China, assembled in Malaysia or Vietnam, and shipped onward with a different customs trail than a direct China export. (ft.com; orfonline.org) That is why analysts are focusing on Southeast Asia’s transshipment hubs rather than only on factories inside China. The Financial Times reported in August 2025 that Chinese manufacturers were rethinking investment in Southeast Asia as U.S. restrictions on transshipment and tariffs on alternative hubs changed the math of moving production offshore. (ft.com) Governments in the region have tried to balance security ties with Washington and trade ties with Beijing for years. The Observer Research Foundation wrote on April 23, 2026 that new U.S. tariff pressure and a temporary U.S.-China trade truce were both squeezing Southeast Asian economies and narrowing their room to maneuver. (orfonline.org; orfonline.org) The administration says these tariffs are about national security and rebuilding domestic capacity. Critics in trade and manufacturing argue that selective tariffs can still raise costs for U.S. buyers because the same supply chain may cross three or four borders before a product reaches an American port. (whitehouse.gov; federalregister.gov) The next test is whether Washington keeps these measures limited to a few strategic sectors or expands them into broader tariff schedules. Either way, the pressure is already moving beyond China’s borders and into the assembly lines, ports and customs paperwork of Southeast Asia. (federalregister.gov; orfonline.org)