A full-blown tariff war with the US could prove a gut punch for Mexico, which is already battling an economic slowdown. Latin America’s second-biggest economy depends heavily on its commercial relationship with its northern neighbor — its top trading partner by a wide margin.

With more than 80% of vehicles exported from Mexico to the United States, experts on Mexico's auto industry appear to be bracing for impact.

Suppliers to Mexico factories worry about Trump's pending tariffs, especially on the automotive industry, at annual El Paso manufacturing trade show.