Saltillo, Mexico - Over the years, a “mini-Detroit” blossomed in these desert highlands 200 miles south of the Texas border.

As Trump’s announced tariffs show, the U.S. has the tools and leverage to compel China and Mexico to shut down these operations. Doing this would strike a decisive blow: once these operations ...

Trump underscored his intention to use tariffs as a tool of international economic policy and an increasingly vital source of ...