美国国会研究服务部：2025年美国总统关税行动：时间线与现状报告（英文版）

Since the beginning of his second term on January 20, 2025, President Donald J. Trump has invoked multiple legal authorities to increase tariffs on U.S. imports. Some trading partners have announced retaliatory tariffs on U.S. exports. This report outlines the tariff actions initiated by the President (Table 1, Table 2, Table 3, Table 4, and Table 5) and by foreign governments in response to these actions (Table 6) from January 20, 2025 through September 16, 2025. These tables are based on of