特朗普，关税突发

Group 1 - Trump's team is preparing a backup plan in case the Supreme Court overturns his key tariff powers, aiming to quickly implement new tariffs if necessary [2][4] - The U.S. Department of Commerce and the U.S. Trade Representative's Office are exploring options under Trade Act Sections 301 and 122, which grant the president unilateral tariff authority, although these alternatives may face legal challenges and have limitations [4][8] - Current average tariff rates on U.S. imports are approximately 14.4%, with over half of these tariffs imposed under the International Emergency Economic Powers Act (IEEPA) [7] Group 2 - If the Supreme Court rules against Trump, the government may have to refund over $88 billion in tariffs, with officials indicating a 50-50 chance of winning the case [10] - Trump's recent executive order modifies tariffs on Brazilian goods, maintaining a 40% tariff on some products while eliminating additional tariffs on specific agricultural products and aircraft parts [12] - The Brazilian Vice President noted that while some tariffs have been lifted, about 22% of exports to the U.S. are still subject to high tariffs, indicating ongoing negotiations between the two countries [12]