钢铝之后，特朗普又考虑对铜加关税

Group 1 - The core viewpoint of the article is that the U.S. government, under President Trump's directive, is moving to impose tariffs on imported copper to reduce dependency on foreign sources, particularly from South America and China, due to national security concerns [1][2][3]. - The investigation into the impact of copper imports will include not only copper ore but also derived products like copper wire and scrap, which could broaden the scope of the tariffs [2]. - The U.S. Geological Survey indicates that approximately 40% of global copper production comes from South America, with the U.S. expected to rely on imports for 45% of its copper consumption by 2024 [3][4]. Group 2 - The U.S. aims to increase domestic copper production by 70% by 2035, reducing reliance on imports to 30% [3]. - The U.S. possesses the fifth-largest copper reserves globally but lags in smelting technology compared to China, which dominates the copper smelting and processing sector [4]. - The Trump administration plans to eliminate exemptions on tariffs for steel and aluminum, expanding the scope to include downstream products like screws and aerospace parts [4].