回顾2025：特朗普关税风暴席卷全球的一年

Core Viewpoint - The year 2025 marked the beginning of a tumultuous trade war initiated by President Trump, characterized by a series of new tariffs that plunged the U.S. into conflicts with nearly all countries globally [1]. Group 1: Key Actions and Developments - In the first quarter, tariffs were primarily targeted at key trade partners: Canada, Mexico, and China, with the U.S. increasing import tariffs on steel and aluminum to 25% [3]. - By April, the trade war escalated significantly, with Trump announcing comprehensive tariffs affecting almost all countries, leading to a stock market crash and a dramatic increase in tariffs between the U.S. and China, reaching 145% and 125% respectively [4]. - From May to July, the Trump administration boasted about trade "framework" agreements while simultaneously threatening further tariffs and increasing steel and aluminum tariffs to punitive levels of 50% [5]. Group 2: Legal and Regulatory Challenges - In August, tariffs on over 60 countries and the EU were implemented, with Canada facing a 35% increase in import taxes, and the "de minimis rule" was abolished, removing tax exemptions for low-cost imports [6]. - By September to December, the tariff disputes were escalated to the Supreme Court, where doubts were raised about the president's authority to impose such extensive tariffs, while some tariffs on food items were reduced or eliminated due to rising price pressures [7].