A line of Mexican National Guard and Army trucks are rumbling along the border separating Ciudad Juárez and El Paso, Texas, among the first of 10,000 troops Mexico has sent to its northern frontier fo

Over the past year, however, President Donald Trump’s threatened 25% tariffs against Mexico and Canada have plunged manufacturing hubs all along the northern Mexican border into limbo, a state that persists despite a one-month reprieve to which Trump agreed on Monday.