She has also taken an active role in encouraging Americans to get vaccinated.
"Thank you, Mr. President, for having the confidence in me".
Harris said the current situation was in part caused by the Trump-era dismantling of a system that allowed United States officials to process children's asylum requests in their home countries.
It is a task that comes with some political risks for Harris, a potential future presidential candidate.
"While we are clear that people should not come to the border now, we also understand that we will enforce the law and that we also - because we can chew gum and walk at the same time - must address the root causes that cause people to make the trek, as the President has described, to come here".
"We're going to look at the possibility for people in their home countries in the Northern Triangle to have a predictable, regular process of seeking asylum there so they don't have to take this phenomenally unsafe journey or, worse yet, send their children unaccompanied", said one senior official who briefed reporters on the Harris move. Instead, she acted as a "full partner" to Biden, appearing often physically alongside him on all the administration's efforts, including their self-proclaimed top priority of managing the coronavirus pandemic.
In February, US Customs officials took more than 100,000 people into custody along the southern border, a 28% increase on the previous month.
United States Vice President Kamala Harris has called a recent wave of unaccompanied children crossing the country's southern border from Mexico a "huge problem", but said it would not be solved "overnight".
"This new surge we're dealing with now started in the last administration but it's our responsibility to deal with it humanely", Biden said.
Harris urges Congress to act on gun control legislation for lasting impact
The Senate Judiciary Committee held a hearing on reducing gun violence in the wake of Monday's attack in Colorado . Charlie Baker said Wednesday afternoon that the country would be well served to replicate the tight rules in MA .
"Should we be processing these cases faster?" she asked.
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Senior administration officials said Harris's focus will be on regional solutions and working with leaders in the region to make it safer for people to remain in their home countries and make asylum requests there.
She added that two Biden administration envoys were now travelling to Mexico and Guatemala where the White House says they will seek "to develop an effective and humane plan of action to manage migration".
As Steve Doocy broke this down, he sarcastically remarked that "Luckily, he, Joe Biden, has put the vice president in charge of this, because she knows that the border is no laughing matter".
Officials said Biden brought Harris into the new role because of an inherent level of trust.
Sure enough, Fox aired the Harris clip yet again before footage from Biden's announcement.
It marks the first time that Biden has assigned a specific portfolio to Harris, who is seen as representing a younger generation in the Democratic Party and has been constantly at his side since they entered office on January 20.
"Vice President Harris taking on this challenge in her own style, in her own way", the official said.