Donald Trump’s threat to impose tariffs on goods from Canada and Mexico could upend current U.S.-Mexico cooperation on immigration.

Mexican President Claudia Sheinbaum has clapped back at President-elect Trump’s proposed 25% tariff on imported goods from Mexico, saying she would impose tariffs of her own on the U.S.

MEXICO CITY — Mexico’s president responded angrily Tuesday to President-elect Donald Trump’s pledge to impose a 25 percent tariff on its products if the country didn’t curb the flow of irregular migrants and fentanyl, warning that the penalties would only wind up causing inflation and unemployment in the United States.