President-elect Donald Trump has made a vow to impose tariffs of 200 to 500 percent on auto and truck imports from Mexico. These steep tariffs would not only raise car prices north of the border and shock the Mexican auto sector, but it would also cost jobs in the United States, Julieta Contreras argues. https://t.co/bOKxKhE58T https://t.co/9PqCp8Bkf8.