US Ambassador Perdue Accuses China of Weaponizing Rare Earth Dominance Amid Escalating Export Controls and Supply Chain Tensions

U.S. Ambassador to China David Perdue has publicly warned that Beijing is 'weaponizing' its near-monopoly over rare earth elements and related technologies, escalating restrictions that target efforts to build alternative supply chains outside China. In statements on Fox News Sunday and on X in late September 2026, Perdue described China's actions as creating unacceptable single-source dependencies, warning of criminal penalties, asset seizures, and exit bans for those pursuing diversification. These remarks come against the backdrop of ongoing U.S.-China trade negotiations following the Trump-Xi summit.

China controls approximately 88-97% of global rare earth processing and magnet production capacity, a position built over decades and now leveraged through export licensing regimes initiated in April 2025 on seven heavy rare earths and magnets. Further rules announced in October 2025 expanded controls to technology transfers, extraterritorial applications, and assistance to foreign operations—measures partially suspended until at least November 2026 (with some reports indicating extensions to January 2027). In June 2026, China's Commerce Ministry added MP Materials (operator of the Mountain Pass mine in California) and USA Rare Earth, along with eight other U.S. firms, to an export control list prohibiting shipments of dual-use items, directly impacting Pentagon-backed efforts to revive domestic rare earth magnet manufacturing.

The moves have real-world effects: disrupted automotive, defense, and electronics supply chains; soaring ex-China prices for materials like dysprosium (up over 800% in some indices since controls began); and renewed focus on allied diversification, including G7 targets to limit reliance on any single non-bloc supplier. U.S. investments, including hundreds of millions from the Department of Defense into MP Materials and Commerce Department support for USA Rare Earth, underscore the national security stakes, yet full domestic capacity remains years away. Perdue framed the issue as part of broader U.S. dependence on China in magnets, pharmaceuticals, and shipbuilding, signaling a 'bumpy road' ahead despite summit diplomacy.

Analysts note these controls mirror U.S. technology export strategies but exploit China's processing dominance, raising risks of further escalation in critical minerals geopolitics.