Washington d.c.: Polysilicon, a crucial base material for semiconductor and solar-power supply chains, has been at the forefront of a new presidential proclamation aimed at revitalizing the U.S. polysilicon sector. For years, the United States' reliance on foreign imports in this sector has raised concerns over the erosion of its economic and national security. In response, President Donald J. Trump has announced a series of strategic actions designed to safeguard domestic production and reinforce national security. According to The White House, the decision follows a comprehensive report from the Secretary of Commerce, who conducted an investigation under section 232 of the Trade Expansion Act of 1962. The report highlighted that the importation of polysilicon and its derivatives into the United States posed a significant threat to national security. It emphasized the material's centrality to semiconductor production, which is vital for various sectors, including defense systems. Without a secure domestic s upply, the U.S. cannot adequately produce or scale up its semiconductor manufacturing, a necessity underscored in a previous proclamation concerning semiconductor imports. The report also noted the role of polysilicon in solar product manufacturing, which supports U.S. defense programs and artificial intelligence advancements. The investigation revealed a global overproduction of polysilicon, exacerbated by foreign government policies favoring domestic production, which has significantly diminished U.S. market share in this sector. In light of these findings, the Secretary of Commerce proposed several measures, including establishing minimum import prices (MIP) for polysilicon and its derivatives and imposing a 15 percent duty on downstream derivatives. These steps aim to create a protected domestic market, allowing U.S. producers to compete effectively. Additionally, an onshoring program is suggested to encourage the establishment of new manufacturing facilities in the United States. President Trump has c oncurred with the Secretary's recommendations, emphasizing the necessity of these actions to ensure national security. The proclamation introduces a MIP program to foster an economically viable market for U.S. polysilicon production. Furthermore, a 15 percent tariff on polysilicon derivatives is set to replace a previous safeguard tariff on solar cells and modules, which expired earlier in the year. The proclamation also details incentives for domestic investment in polysilicon production, granting the Secretary of Commerce the authority to negotiate company-specific deals to bolster the U.S. supply chain. These actions are deemed essential for maintaining the commercial viability of domestic polysilicon production and meeting the nation's economic and national security needs. The strategic plan outlined in the proclamation aims to revitalize the U.S. polysilicon sector, promote employment, and encourage investment. The measures are set to take effect on December 4, 2026, with ongoing monitoring and potenti al adjustments as needed to counteract any threats to national security posed by polysilicon imports.