The Trump administration has paused plans for new tariffs on refined copper, leaving unresolved a policy decision that could affect housing construction, electrical wiring and AI infrastructure. The United States imports roughly half of its annual copper supply and has only two domestic copper smelters. Section 232 tariffs (U.S. national-security trade duties) of 50% on many semi-finished copper products and derivatives have been in effect since August 1, 2025, with modifications made in April 2026. Those duties have raised prices, pressured importers and created cost challenges for manufacturers. A proposed second phase would impose a 15% tariff in January 2027, rising to 30% by 2028, but no final decision has been issued. Commerce Secretary Howard Lutnick was assigned to assess the copper market and provide recommendations by June 30, 2026; that deadline passed without a definitive ruling. Copper demand is projected by S&P Global to increase 50% by 2040, driven largely by AI expansion, electrification and defense applications. Copper is also used extensively in residential wiring, plumbing and HVAC systems, while builders already face higher material costs from earlier tariffs on steel, aluminum and lumber. If the proposed tariffs are eventually imposed, copper futures (contracts tracking future copper prices) could become more volatile, affecting construction, industrial manufacturing and data-center companies. Businesses with locked-in supply contracts would be better positioned than those exposed to spot prices, potentially producing different outcomes within the same sectors.