Biden moves to reverse Trump immigration policies, too slowly for some

US President Joe Biden on Tuesday ordered a review of asylum processing at the US-Mexico border and the immigration system as he seeks to undo some of former President Donald Trump's hardline policies.

Biden also created a task force to reunite migrant families, who were separated at the border by Trump's 2018 'zero tolerance' strategy.

"We are going to work to undo the moral and national shame of the previous administration that literally, not figuratively, ripped children from the arms of their families," Biden said, as he signed the three immigration-related executive orders at the White House.

The executive orders called for a dizzying array of reviews and reports that could trigger policy changes in the weeks and months ahead, but provide limited immediate relief to immigrants barred by Trump-era rules.

Immigration advocates have urged the new Democratic administration to quickly undo Trump's policies but Biden aides say they need time to unravel the many layers of immigration restrictions and to put in place more migrant-friendly systems.

"It's not going to happen overnight," White House Press Secretary Jen Psaki said on Tuesday.

The cautious strategy reflects the tightrope Biden is walking to reverse hardline Trump policies while simultaneously trying to prevent a surge in illegal immigration. Biden opponents could also derail or slow down his agenda with lawsuits if his administration moves too quickly and fails to follow proper procedures.

In a sign of the wary approach, Biden's executive orders on Tuesday did not repeal an order known as 'Title 42,' which was issued under Trump to stop the spread of the coronavirus and allows US authorities to expel almost all people caught crossing the border illegally.

He did, however, mandate a review of the Migrant Protection Protocols (MPP), a Trump programme that ordered 65,000 asylum seekers to wait in Mexico for their US court hearings.

The Biden administration has stopped adding people to the program but has not yet outlined how it will process the claims of those already in it.

Across the border in Mexico, migrants enrolled in MPP said they were anxious for news about Biden's plans for the programme.

The review is expected to start the process to rescind it, according to two people familiar with the plan.

Biden's asylum-focused order called on US agencies to address drivers of migration in Central America, expand legal pathways to the United States and consider ending Trump-era asylum pacts with Guatemala, El Salvador and Honduras.

After the order, Secretary of State Antony Blinken said in a written statement the United States intended to suspend and terminate the agreements, which sought to allow asylum seekers from other countries to be sent to those nations.