Trump, on his first day in office, suggested he may do just that. Trump has threatened to impose 25% tariffs on all goods from Canada and Mexico on February 1 in response to what he views as inadequate border security failing to stop drugs and migrants from coming into the United States.

Every day a flurry of parts and products are shuttled between Texas and Mexico, part of a cross-border supply chain to make everything from cars and heavy duty machinery to flat screen televisions. The future of that partnership,