More than just a crop, corn is the cornerstone of U.S.-Mexico trade and North American economic integration. However, recent actions by Mexico are putting this relationship to the test, with implications that could ripple beyond the border.
Corn is quintessentially Mexican, a staple crop deeply rooted in the country's cultural and culinary identity. Mexico is self-sufficient in the white corn used to make tortillas, but its livestock industry relies heavily on imported yellow corn, much of which is genetically modified.
almost 99 percent Of Mexico's yellow corn imports, imports from the United States are $5.3 billion These imports feed Mexico's agribusinesses and keep meat, eggs, and dairy products affordable for families.
But Mexico is also a lifeline for U.S. farmers in Iowa, Illinois, Nebraska and Missouri. the country will bear the burden 40% or more US yellow corn exports US jobs 130,000. Last year, Mexico overtook China to become the United States' largest agricultural export market.
Despite this interdependence, Mexico's policies under former President Andrés Manuel López Obrador and current President Claudia Sheinbaum have put this trade at risk. The United States and Canada have already filed a dispute under the United States-Mexico-Canada Agreement over legislation banning genetically modified corn for human consumption and a push to phase out corn as animal feed.
In December, the USMCA Disputes Committee dominated It argued that Mexico's restrictions on genetically modified corn violate market access and food safety regulations. The ruling stressed that Mexico's measures lack scientific evidence, disrupt trade flows, harm U.S. and Canadian farmers, and create uncertainty for exporters.
Mr. Sheinbaum now faces a crucial choice: abide by the ruling or risk financial and strategic consequences. So far, she has expressed the following intentions: prohibit cultivation And human consumption of yellow corn at the constitutional level is a move that cannot bring Mexico into compliance with trade agreements.
Mexico's reaction to the commission's ruling will shape the trajectory of U.S.-Mexico relations under the second Trump administration.
There are three significant risks associated with non-compliance. The first is that the Trump administration could impose retaliatory tariffs on $5 billion in Mexican exports, ranging from cars to avocados to tequila. Such tariffs would hurt Mexico's economy and raise prices for American households. Meanwhile, import restrictions on yellow corn could disrupt Mexico's food supply and drive up prices for staple foods like chicken, pork and milk, hitting the most vulnerable households the hardest.
Second, noncompliance would weaken Mexico's position ahead of a critical 2026 review of the USMCA trade agreement. The United States could demand concessions on auto trade, labor standards, energy policy, and other areas. Worse, it risks dismantling three decades of trade integration that has supported 17 million jobs in North America.
Importantly, the United States also did not obey Important USMCA rulings regarding automobile rules of origin have been ongoing for more than two years. U.S. inaction would set a bad precedent, but doubling down on Mexico's non-compliance would further undermine the agreement's credibility.
Third, failure to resolve the corn conflict will weaken North America's ability to present a unified economic front against increasing global competition, particularly from China and Russia. Without USMCA compliance, the continent risks losing its competitiveness in trade and investment and threatening regional food security.
President Sheinbaum's response to this issue will define her legacy and Mexico's role in the region. The Mexican government needs to recognize that protecting economic integration is just as important as protecting Mexico's cultural heritage.
The path forward is clear. To avoid escalating trade tensions, Mexico should rescind the 2020 and 2023 decrees and rescind the proposed ban on genetically modified corn to restore compliance with the agreement. It will then need to work with its U.S. counterparts to explore sustainable agriculture and innovation to rebuild trust.
As the Mexican saying goes, “Sin maiz no hay pais,” without corn there is no country. But there can be no prosperity without economic integration. Mexico and the United States must protect the hard-won gains of North American trade for everyone's benefit.
Diego Marroquín Vitale is a North American scholar at the Woodrow Wilson Center.
