SAN LUIS POTOSI, Mexico — As BMW opened its new billion-dollar auto assembly plant in this central Mexican city, its second in North America, the timing couldn't be more inopportune.
Just a week earlier, President Donald Trump tweeted a new plan to impose a 5 percent tariff on all Mexico imports starting June 10 — a stick to nudge the Mexican government to get tougher on "illegal" immigrants streaming across the U.S. border. It wasn't until Friday that the president lifted his threat.