IEEPA border tariffs on Mexico (struck down)
25% tariffs on non-USMCA-qualifying Mexican goods, imposed March 2025 over border-security and drug-trafficking concerns after a one-month pause, with USMCA-originating goods exempted days later. The Supreme Court's February 2026 IEEPA ruling voided the program; paid duties are potentially refundable.
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Timeline
- Struck downCourt ruling / statute
Struck down by the Supreme Court
The IEEPA ruling voids the Mexico border tariffs.
Official sources - ReducedCBP guidance
USMCA-originating goods exempted
Goods qualifying for USMCA preference are excluded from the additional duties.
Official sources - In effectCBP guidance
Tariffs take effect
CBP implements 25% additional duties on products of Mexico.
Official sources - AnnouncedExecutive order
Executive order signed, then paused 30 days
Order imposes 25% tariffs on Mexican goods; implementation is paused for 30 days after commitments on border enforcement.
Official sources
Legal challenges
Learning Resources, Inc. v. Trump
Court: U.S. Supreme Court · Case status: Ruled invalid
Refund implications: Duties paid on non-USMCA Mexican goods are potentially refundable. Monitor CBP guidance.
Official sourcesOfficial sources
Last verified 06/12/2026
Related measures
IEEPA reciprocal tariffs (struck down by the Supreme Court)
The April 2025 'Liberation Day' executive order imposed a 10% baseline tariff on nearly all imports plus higher country-specific rates. After a year of pauses, extensions, and litigation, the Supreme Court ruled 6–3 on February 20, 2026 that IEEPA does not authorize tariffs, voiding the entire program. Duties already paid — industry estimates run as high as $175 billion — are potentially refundable; the administration replaced part of the program with a Section 122 surcharge the same day.
IEEPA fentanyl tariffs on China (struck down)
Tariffs on Chinese goods imposed in February 2025 over fentanyl trafficking: 10% at first, raised to 20% in March 2025, then cut back to 10% in November 2025 under the U.S.–China trade truce. The Supreme Court's February 2026 IEEPA ruling voided them entirely. As of June 2026 Washington and Beijing have discussed restoring equivalent tariffs under other authorities, but nothing has been formalized.
IEEPA border tariffs on Canada (struck down)
25% tariffs on non-USMCA-qualifying Canadian goods (10% on energy and potash), imposed March 2025 over drug-trafficking concerns after a one-month pause. USMCA-originating goods were exempted days after the tariffs took effect. The Supreme Court's February 2026 IEEPA ruling voided the program; paid duties are potentially refundable.