Biden in the call said that his priorities are to protect the security, prosperity, health and the way of life of American people and to preserve "a free and open Indo-Pacific". The policy required asylum seekers to wait in Mexico while their cases in the USA moved forward, effectively stranding people along the border.
Joe Biden, who as vice president under Barack Obama met Xi Jinping, told the Chinese leader the United States was concerned about Beijing's human rights abuses.
An global organisation will test migrants for COVID-19 while they are in Mexico.
In his letter, the president said Trump's declaration of a national emergency had been "unwarranted" and that he had directed that "no more American taxpayer dollars be diverted to construct a border wall".
Trump challenged China over its trade policies by imposing punishing tariffs, an instrument he also used on traditional allies, drawing criticism for not taking a more unified approach with USA friends to stand up to Beijing on issues such as intellectual property theft and other economic practices.
All hypotheses still open in Covid-19 origins probe, says WHO
Support PREMIUM TIMES' journalism of integrity and credibilityGood journalism costs a lot of money. But he also said they are still far from identifying the origins of the coronavirus .
Biden is under pressure at home and overseas to maintain Trump's stance, as the West looks to hold China to account for human rights abuses and at a time when some in the United States and wider world blame Beijing for failing to contain the coronavirus pandemic, which was first discovered in the central city of Wuhan.
Raul Ortiz, deputy chief of the U.S. Border Patrol, said this week that more than 3,000 people had been stopped crossing the border illegally in each of the previous ten days, compared to an average of 2,426 people crossing illegally during the entire month of January. "Asylum processes at the border will not occur immediately, will take time to implement".
The president said China and the U.S. should respect each other and properly manage their disputes in a constructive manner. CBP, which doesn't have capacity to hold families because of COVID-19, in recent weeks has released dozens of people into the USA with instructions to appear in court later. The Trump administration appealed both of those rulings.
Jon Feere, a senior adviser to ICE under Trump, said such moves are part of a larger pattern that the Biden administration will come to regret.
The migrants' claims will initially be heard at three ports of entry along the border, with organizations working to identify those in line the longest and those deemed particularly vulnerable.