Sullivan accused Jacobson of shaping US relations with Mexico and sought to work with El Salvador, Guatemala and Honduras to improve conditions there.
Just last month, Biden announced that he was holding Vice President Kamala Harris responsible for diplomacy in the region known as the Northern Triangle.
Biden has tried to keep his administration’s focus on fighting the coronavirus and revitalizing the economy, but problems on the border have increasingly come to the fore and even some of his allies have criticized him, particularly for treating unaccompanied children who plants were housed in overcrowded houses.
Republicans accuse Biden of pushing through policy changes that fueled the surge in migrants at the border and of being unable to deal with them once they arrive.
News of Jacobson’s departure comes a day after the government announced that the number of migrants attempting to cross the border rose sharply in March, including a record number of unaccompanied children taken into custody.
More than 18,800 unaccompanied children crossed the border in March, a record number; The previous high was more than 11,000 children in May 2019. March numbers represent an increase of nearly 100 percent from February, when more than 9,400 minors were detained.
In early March, Jacobson appeared at a White House briefing to prevent migrants from traveling to the United States. But she was wrong when she spoke Spanish and said the border was open when she tried to say it was closed.