Biden's decision gives a high-profile assignment to his vice president, a former US senator from California, and gives her the same role he played as vice president for then-President Barack Obama.
Ms Harris may not have been the most progressive of the Democrat Party's presidential nominees, but she was one of the strongest voices on immigration in the primary, calling for a more compassionate approach to those arriving at the southern border.
Announcing Ms Harris's appointment as his immigration czar, Mr Biden told reporters and officials at the White House: "She's the most qualified person to do it, to lead our efforts with Mexico and the Northern Triangle [Honduras, Guatemala and El Salvador], and the countries that are going to need help in stemming the movement of so many folks - stemming the migration to our southern border".
USA officials are battling to house and process an increasing number of unaccompanied children, many of whom have been stuck in jail-like border stations for days while they await placement in overwhelmed government-run shelters. She's also tasked with developing and implementing a long-term strategy that gets at the root causes of migration from those countries.
By handing off this large responsibility to his VP, the AP notes, Biden is replicating the way that President Obama leaned on Biden's experience to handle the troop withdrawal in Iraq. And though Harris won't be directly in charge of what happens at the southern border, and aides say she will be exclusively responsible for leading efforts with Central American leaders, it seems likely she will shoulder the blame if further complications arise or if the surge of migrants worsens in the coming months. The second midwife arrived just after the head had arrived!"Mike said, "As every man would say, she was a warrior, they always are, we can never judge a woman in terms of what they have to go through in childbirth".
On Wednesday, White House press secretary Jen Psaki said the administration was "committed to transparency and we'll continue to work with agencies on creating avenues for media access to and visibility into these facilities".
Pence's efforts on the coronavirus were stymied by Trump's hijacking of the task force's daily briefings early in the pandemic.
Atlanta Police hold briefing on spa shooting
This inflammatory labeling may be the spark for new acts of violence against the Asian-American population in the United States. About an hour later, police in Atlanta found three Asian women dead from apparent gunshot wounds at a beauty spa.
And Gore faced headwinds from Republicans in Congress who were reluctant to give him a win ahead of his unsuccessful 2000 run for the White House. "Whether or not the president had their back".
"I said when we became a team and got elected that the vice president was going to be the last person in the room", he said.
United States border facilities are overwhelmed by migrants who want to enter the US.
While acknowledging a "big problem" with the rising numbers of migrants, Rep. Norma Torres, D-Calif., one of five lawmakers to tour the facility Wednesday, credited the Biden administration with treating young migrants far more humanely than the Trump administration.
The convention center will accommodate up to 1,400 children, said a spokesperson for the Office of Refugee Resettlement.
"Are we looking at overcrowding at the border, particularly these kids?" The Carrizo Springs facility was established in 2019 during the Trump administration and re-opened in February.
There has been a spike in migration following the inauguration of Joe Biden.