特朗普突然改口，美国一锤定音，加税15%通知发往中国，局势恶化

Core Viewpoint - The U.S. Supreme Court's ruling against Trump's tariff policy has led to a rapid and confusing shift in trade policy, with Trump quickly implementing a new global import tariff of 15% after initially announcing a 10% tariff, creating uncertainty for global trade partners [1][3][4]. Group 1: Legal and Political Developments - The Supreme Court ruled 6-3 that Trump's tariff policy under the International Emergency Economic Powers Act was unauthorized, effectively nullifying nearly a year of tariff imposition [1]. - Following the ruling, Trump issued a new executive order to impose a 10% global import tariff for 150 days, which was later increased to 15% within 24 hours [3][4]. - The legal and political ramifications of the ruling have led to a surge in lawsuits from over 1,000 companies seeking refunds for tariffs deemed illegal, with potential refunds exceeding $175 billion [6][12]. Group 2: Economic Impact and Costs - The tariffs imposed under the now-invalidated law have generated approximately $130 billion in revenue, with estimates suggesting the total amount needing to be addressed could exceed $175 billion [6]. - Analysis from the New York Federal Reserve indicates that nearly 90% of the economic burden from these tariffs has fallen on U.S. businesses and consumers, contradicting the government's claim that foreign exporters bear the cost [7]. - The ongoing tariff situation has contributed to a significant rise in U.S. business bankruptcies, reaching a 15-year high, with at least 717 companies filing for bankruptcy, particularly affecting manufacturing, construction, and transportation sectors [12]. Group 3: International Reactions and Future Implications - The international community, including the EU and Japan, has expressed concern over the unpredictability of U.S. trade policy, with potential retaliatory measures being considered [9][10]. - Trump's administration is expected to explore additional legal avenues for imposing tariffs, including the Trade Expansion Act and other provisions, indicating that the current tariff situation may evolve further [9][12]. - The complexity of the tariff situation has created a convoluted landscape for global trade, with ongoing legal battles and political maneuvering likely to shape future trade relations [13].