美国最高法院关税裁决影响如何？

Core Viewpoint - The U.S. Supreme Court ruled that most tariffs implemented by Donald Trump since his return to the White House are illegal, undermining a key pillar of his economic plan [1] Group 1: Tariff Changes - The Supreme Court's ruling effectively cancels the "reciprocal" tariffs that applied to nearly all products entering the U.S. [4] - The average actual tariff rate on imported products is expected to decrease from 16.8% to approximately 9.5% [5] - Companies that have paid these tariffs can apply for refunds, although the exact amount is uncertain; economists estimate that the revenue from these tariffs could be around $130 billion to $140 billion by 2025 [5][6] Group 2: New Tariff Implementation - President Trump signed an executive order to impose a new global tariff of 10% starting February 24, lasting for 150 days [2][8] - The new tariff applies to countries that have already signed trade agreements with the U.S., with previous rates being 15% for the EU and Japan, and 18% for India [7] Group 3: Negotiation and Legislative Implications - The Supreme Court's decision may weaken the U.S. government's ability to negotiate trade agreements, as the ability to reduce tariffs is a key negotiation tool [7] - The executive order is based on the Trade Act of 1974, which allows the president to correct trade imbalances but is temporary and requires Congressional approval for long-term implementation [8][9] - A potential solution for the government is to pass legislation granting the authority to reimpose tariffs, but this may be challenging due to upcoming midterm elections and some Republican opposition to Trump's tariff strategy [10]