China Tightens Rare-Earth Grip on U.S. Firms, Threatening Trade Clash

China took aim on Monday at a U.S. government program to reduce American reliance on Chinese imports for rare-earth magnets, a move that risks reigniting trade tensions with President Trump. New restrictions will prohibit Chinese companies from shipping certain rare-earth metals to two companies that are leading the Trump administration’s efforts to revive the American rare-earth industry. The metals banned by China’s Ministry of Commerce are critical for a wide range of products, from cars to military drones, and China controls nearly the entire global supply of them. After meeting…