Trump Signs Proclamation to Adjust Tariffs on Aluminum, Steel, and Copper Imports
President Donald Trump signs an executive order in the Oval Office of the White House on April 30, 2026. Andrew Harnik/Getty Images President Donald Trump signed a proclamation on June 1 to amend tariffs on aluminum, steel, and copper imports in an effort to boost investment in the U.S. agriculture and manufacturing sectors. The proclamation