The 25% tariffs, which Trump first threatened in November to demand Mexico and Canada stem the flow of fentanyl and illegal immigrants into the U.S., were among the first foreign policy obstacles for Sheinbaum, who took office in October as Mexico's first woman president and promised to keep a "cool head" during tariff talks.

Mexico and the United States have reached a one-month agreement to stave off tariffs and a looming trade war, the threat of which sent global markets tumbling early Monday. The 25% tariffs on Mexico were set to go into effect Tuesday,