Group 1 - The Trump administration has signed an executive order imposing a 10% global tariff on all countries, effective immediately, following the Supreme Court's overturning of previous tariff policies [1][2] - The new tariff is implemented under Section 122 of the Trade Act of 1974, which allows the president to unilaterally impose tariffs for a limited period of 150 days without congressional approval [2][6] - The Supreme Court's ruling invalidated previous tariffs imposed under the International Emergency Economic Powers Act (IEEPA), raising questions about the legality of tariffs on goods from Canada, Mexico, and China [3][6] Group 2 - The average effective tariff rate in the U.S. is projected to rise from 13.6% to 16.5% due to the new 10% global tariff, although it could slightly decrease to 11.4% if current exemptions are maintained [4] - The administration plans to utilize a multi-layered legal framework to support its trade policy, combining Section 122 for a temporary global tariff and Sections 301 and 232 for targeted measures against specific countries or industries [6][7] - The potential for a lengthy legal battle over tariff refunds has emerged, with over 1,500 companies filing lawsuits in response to the Supreme Court's ruling, which could lead to refunds totaling up to $170 billion [8]