Introduction
This week’s events are impossible to ignore, with significant developments in both Mexico and the United States. In Mexico, the assassination of Carlos Manzo once again highlighted a country where violence and criminal regimes dominate daily life. In the U.S., local elections breathed new life into the Democratic Party with victories in California, New Jersey, and Virginia, as well as a symbolic shift in New York with the election of democratic socialist Zohran Mamdani as mayor. Meanwhile, the Supreme Court delivered another political message, demonstrating that in some democracies, the judicial branch can still attempt to curb executive overreach.
U.S. Supreme Court’s Case on Tariff Powers
The U.S. Supreme Court heard arguments in Learning Resources v. Trump and Trump v. V.O.S. Selections, a case with profound implications for the United States and the rest of the world. The core issue is straightforward yet fundamental: can a president impose tariffs under emergency powers? Can they, through this means, set taxes—a power explicitly reserved for Congress by the Constitution—without violating the foundational principle that there should be no taxation without representation?
Six Justices Question Trump’s Tariff Usage
Six of the nine justices, including several appointed by Trump himself, have questioned the extent to which the president has used the International Emergency Economic Powers Act (IEEPA) to impose tariffs on China, Canada, Mexico, and half the global economy. The Court appears to be evaluating whether to curtail this expansive interpretation of executive power. The ruling, expected by year-end, could be the most significant institutional setback for Trump’s protectionist-by-decree approach, which has become the cornerstone of his economic policy.
Potential Impact on Trump’s Tariff Policy
Despite an unfavorable ruling, it is likely that the occupant of the White House will continue to use tariffs as a preferred pressure mechanism, with or without judicial backing. They might simply resort to alternative methods, such as applying Section 232 of the Trade Expansion Act, which allows for tariffs or restrictions on imports deemed a threat to national security. Essentially, a “Plan B, C, or D” in the Mexican government’s lexicon.
Implications for U.S.-Mexico Relations
For Mexico, this situation is not merely a legal anomaly that exceeds the IEEPA’s framework and violates the U.S.-Mexico-Canada Agreement (T-MEC). Throughout the year, Trump’s tariffs have proven to be Washington’s most effective coercive mechanism against President Claudia Sheinbaum’s government, particularly as the T-MEC review approaches in 2026. This is especially true since Mexico has not fully met its trade commitments.
U.S. Trade Groups Reignite T-MEC Complaints
In recent days, U.S. trade groups like the U.S. Chamber of Commerce and the American Petroleum Institute have reactivated their complaints against Mexico for T-MEC violations. Among the accusations are preferential treatment for Pemex and CFE, energy sector centralization, and restrictions on competition. The resurgence of these complaints confirms that pressure will intensify as the 2026 review nears.
Bilateral Relations and the T-MEC Review
It’s worth noting that the script is familiar. In 2022, the U.S. Trade Representative (USTR) initiated a consultation mechanism for these same issues, but the Biden administration avoided escalating the dispute to prevent complicating its immigration agenda ahead of midterm elections. The bilateral relationship is likely to remain in a managed state of tension, punctuated by pragmatic doses dictated by geography and political circumstances.
Supreme Court’s Decision and the Future of Democratic Governance
As the U.S. public consultation process concludes amidst a government shutdown, the formal T-MEC review will arrive just before the 2026 midterms. Any substantial changes must be ratified by a Congress whose composition remains to be determined. Meanwhile, the Supreme Court will decide whether the United States normalizes or curbs the temptation to govern by decree, once the world’s most stable democracy.
Key Questions and Answers
- What is the main issue before the U.S. Supreme Court? The court is evaluating whether a president can impose tariffs under emergency powers, potentially violating the constitutional principle of no taxation without representation.
- How might the Supreme Court’s decision impact U.S.-Mexico relations? An unfavorable ruling could limit the effectiveness of tariffs as a coercive mechanism, but it may not prevent their use. Increased pressure on Mexico regarding the T-MEC is expected as the 2026 review approaches.
- What alternative methods could the U.S. use to impose tariffs if the Supreme Court limits executive power? The U.S. could apply Section 232 of the Trade Expansion Act, which allows for tariffs or restrictions on imports deemed a threat to national security.
