Fact Sheets Fact Sheet: President Donald J. Trump Bolsters National Security and Strengthens U.S. Supply Chains by Imposing Tariffs on Polysilicon and its DerivativesDEFENDING THE AMERICAN INDUSTRIAL BASE: Today, President Donald J. Trump signed a Proclamation to protect America’s polysilicon industry and supply chain from imports that threaten national security. The Proclamation imposes a minimum import price program on imports of polysilicon and polysilicon derivatives to create a level playing field for American producers of these strategic goods. The Proclamation authorizes the Secretary of Commerce to establish an incentive program for companies that will invest in building, expanding, or refurbishing facilities that produce polysilicon and polysilicon derivatives. STRENGTHENING ECONOMIC AND NATIONAL SECURITY: President Trump’s polysilicon tariff program will protect the national security of the United States and its defense and defense-adjacent industrial base. BUILDING ON A RECORD OF SECURING CRITICAL INDUSTRIES: President Trump has long recognized that America’s national security and economic strength depend on rebuilding key sectors of our industrial base.