Vice President Kamala Harris speaks about the southern border during a meeting with President Joe Biden in the State Dining Room of the White House, Wednesday, March 24, 2021, in Washington. (AP Photo/Evan Vucci)
A child rests its head on a table as a U.S. Customs and Border Protection officer processes migrants after they crossed into the U.S., early Wednesday, March 24, 2021, in Roma, Texas. A surge of migrants on the Southwest border has the Biden administration on the defensive. The head of Homeland Security acknowledged the severity of the problem but insisted it’s under control and said he won’t revive a Trump-era practice of immediately expelling teens and children. (AP Photo/Julio Cortez)
WASHINGTON — President Joe Biden tapped Vice President Kamala Harris to lead the White House effort to tackle the migration challenge at the U.S. southern border and work with Central American nations to address root causes of the problem.