Supreme Court Strikes Down IEEPA Tariffs as Trump Unveils New Global Duty

Overview

• In a 6–3 decision written by Chief Justice John Roberts, the Court ruled the IEEPA does not authorize the president to impose broad import tariffs, limiting the ruling to Trump's sweeping 'reciprocal' duties.
• Trump announced a temporary 10% across-the-board tariff under Section 122 and said existing measures under Sections 232 and 301 remain in force, with new 301 and other probes to follow.
• Subsequent reporting indicated Trump raised the planned global tariff to 15% under the same Section 122 authority, a little-tested tool capped at 150 days and likely to draw litigation.
• The justices left refunds to lower courts; economists estimate more than $170 billion collected under IEEPA-based tariffs could be contested for reimbursement.
• Brazilian officials said the decision removes the 10% 'reciprocal' tariff and a 40% add-on that hit many Brazilian exports, though sectoral levies such as steel and aluminum under Section 232 remain.