Siller Analysis Reveals US Tariff Risks for Mexican Industry

Gabriela Siller from Banco Base has expressed concerns about the impact of the U.S. Supreme Court’s decision to overturn the IEEPA tariff policy issued by President Donald Trump. According to Jin10, Siller sees this ruling as potentially harmful to Mexico, especially since the status of imported products previously protected under USMCA is now unclear.

Siller’s Concerns About the Layered Tariff Architecture

Although the Supreme Court’s decision to overturn the IEEPA tariffs stands, Trump continues to maintain tariff policies based on Section 232 and Section 301 without changes. Furthermore, the administration will implement a global 10% tariff under Section 122, which will be applied alongside existing tariff mechanisms. According to Siller, this combination of policies will create a double burden for Mexican exporters, with serious implications for the country’s manufacturing and agricultural sectors.

Specific Impact on Key Mexican Products

Siller indicates that this layered tariff strategy will have the most significant consequences on the Mexican automotive industry. Tariffs on vehicles could increase dramatically up to 35%, while Mexican metal products will also face serious pressure with steel tariffs reaching 60%, and aluminum at similar levels. These impacts will not only reduce the competitiveness of Mexican products in the U.S. market but also force local producers to restructure their business models.

Challenges of USMCA Renegotiation Amid Tariff Policies

Siller also warns that reviewing and potentially renegotiating the USMCA agreement will become much more complex in the context of ongoing tariff uncertainties. A new phase of bilateral trade dynamics will require more measured diplomatic strategies to protect Mexico’s economic interests. Siller’s concerns reflect the reality that U.S. tariff policies will continue to shape the regional economic landscape for years to come.