Canada has formally initiated a dispute under the United States-Mexico-Canada Agreement (T-MEC), challenging Mexico’s regulatory approach to its energy sector and trade restrictions on lithium and canola. The complaint, filed in January 2026, marks a significant escalation in trade tensions between the two countries and underscores growing concerns over how Mexico’s domestic policies align with its international obligations.
At the heart of the dispute are longstanding grievances over Mexico’s energy reforms, which have prioritized state-owned enterprises such as the Federal Electricity Commission (CFE) and Petróleos Mexicanos (Pemex). Since 2019, regulatory changes have increasingly favored these entities in electricity generation and fuel markets. In parallel, Mexico’s 2022 nationalization of lithium has effectively barred private and foreign firms from participating in the extraction of this critical mineral, raising further concerns among trade partners.
Canada contends that these measures violate several T-MEC provisions, including those related to national treatment, market access, and fair competition. In support of its case, Canadian authorities recently published a list of Mexican practices they consider discriminatory or inconsistent with the agreement. These include not only energy sector regulations but also import restrictions affecting Canadian agricultural products such as canola.
The outcome could set precedents for how resource nationalism is treated under North American trade rules.
The dispute follows a similar complaint filed by the United States in 2022, which remains unresolved. That case also targeted Mexico’s energy policies and highlighted the potential for systemic friction within the T-MEC framework. The Canadian filing suggests that dissatisfaction with Mexico’s regulatory trajectory is not isolated, but part of a broader pattern of concern among its North American partners.
Mexico, for its part, maintains that its policies are grounded in constitutional mandates that affirm national sovereignty over strategic resources. Authorities argue that favoring state-owned enterprises in sectors deemed vital to national security is both legal and necessary. Supporters of this approach contend that public control over energy and minerals ensures long-term stability and reduces dependence on foreign actors.
The case will now proceed through T-MEC’s formal dispute resolution mechanism. This process includes consultations aimed at reaching a negotiated solution; failing that, it may advance to a panel ruling. If Mexico is found to be in breach of its obligations and does not comply with any resulting recommendations, Canada could be authorized to impose retaliatory tariffs or other trade remedies.
Beyond the immediate legal arguments, the dispute raises broader questions about how resource nationalism interacts with modern trade agreements. T-MEC includes binding commitments designed to promote open markets and non-discriminatory treatment. Yet it also exists alongside domestic legal frameworks that assert sovereign control over key sectors. The outcome of this case could set important precedents for how such tensions are managed within North America’s integrated economic architecture.
Some analysts caution that repeated recourse to dispute mechanisms may strain diplomatic relations and politicize trade enforcement. However, others argue that robust adjudication is essential to maintaining the credibility of rules-based trade. As consultations unfold, both sides will need to balance legal positions with strategic interests in preserving trilateral cooperation.
