US Supreme Court Poised to Rule on Trump Tariffs Challenging Mexico Trade as USMCA Review Looms in 2026
12 January 2026

US Supreme Court Poised to Rule on Trump Tariffs Challenging Mexico Trade as USMCA Review Looms in 2026

Mexico Tariff News and Tracker

About
Welcome to Mexico Tariff News and Tracker, your essential update on the tariffs shaping US-Mexico trade. As we hit early 2026, the spotlight remains on President Trump's aggressive tariff policies and their ripple effects across the border.

The big headline this week: The US Supreme Court is set to issue rulings as soon as January 14 on challenges to Trump's sweeping reciprocal tariffs, invoked under the 1977 International Emergency Economic Powers Act. According to the Journal Record, justices from both sides questioned the legality during November 5 arguments, with Trump himself warning on social media that striking them down would deliver a terrible blow to America. These tariffs target nearly every trading partner, including Mexico, citing trade deficits and fentanyl trafficking as national emergencies. Businesses and 12 mostly Democratic-led states are pushing back, bracing for global economic fallout.

Mexico dodged the worst in 2025, Mexperience reports. While Trump imposed tariffs on autos, steel, and aluminum, USMCA-compliant exports—over 80% of Mexico's to the US—were exempt. US content in Mexican-assembled vehicles gets subtracted, and auto parts are excluded, giving Mexico an edge over rivals like China. That's helped the peso strengthen 16% to 18 per dollar by year-end, despite slower growth.

But tensions simmer. Volkswagen argues Trump's 25% auto tariffs violate USMCA commitments, per CBT News, urging relief over tighter rules. Mexico Business News highlights Economy Minister Marcelo Ebrard's new tariff leverage against China to counter a tough USMCA review looming in July. Flexport warns in Global Trade Magazine of ongoing tariff volatility, while Furniture Today recaps 2025's chaos—from threats on Mexico in February to furniture-specific hikes later.

The USMCA sunset review could spark renegotiation or exit risks, Mondaq notes, fueling uncertainty. Analysts eye peso forecasts from 17 to 20 per dollar by year-end, tied to trade talks and rate cuts.

Stay tuned as rulings drop and reviews near—these moves could redefine North American trade.

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