White House Proclamation Further Adjusts §232 Tariff Regimes for Aluminum, Steel, and Copper

The Biden administration issued a presidential proclamation on June 2, 2026, further modifying tariff structures on imports of aluminum, steel, and copper, building on §232 actions dating to Proclamation 9704 (March 2018). The adjustments signal continued use of national-security tariff authority to manage trade flows in these three key industrial metals.