FILE - In this Feb. 9, 2021 file photo, Mexican President Andres Manuel Lopez Obrador applauds during a ceremony at Chapultepec Castle in Mexico City. Mexico announced Saturday, April 24, 2021, that Lopez Obrador will hold talks with U.S. Vice President Kamala Harris on May 7 to discuss migration, amid an increase in underage migrants at the U.S. southern border. (AP Photo/Marco Ugarte, File)

Vice President Kamala Harris speaks during a virtual meeting with Mexican President Andres Manuel Lopez Obrador at the Eisenhower Executive Office Building on the White House complex in Washington on Friday, May 7, 2021. (AP Photo/Manuel Balce Ceneta)

Vice President Kamala Harris speaks during a virtual meeting with Mexican President Andres Manuel Lopez Obrador at the Eisenhower Executive Office Building on the White House complex in Washington on Friday, May 7, 2021. (AP Photo/Manuel Balce Ceneta)

Vice President Kamala Harris speaks during a virtual meeting with Mexican President Andres Manuel Lopez Obrador at the Eisenhower Executive Office Building on the White House complex in Washington on Friday, May 7, 2021. (AP Photo/Manuel Balce Ceneta)