Senate Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (D-N.Y.) called on the Trump administration on Sunday to appoint a "czar" to oversee the reunification of migrant families separated at the southern border.

"The Trump ‘zero-tolerance’ immigration policy has left many with zero confidence in the admin’s ability to quickly reunite children w/ their parents. The admin should appoint a Czar to break thru the bureaucracy & get these kids out of limbo & back in their parents arms," Schumer tweeted.

The Department of Homeland Security said Sunday morning that it has located all of the more than 2,000 migrant children in its custody who were separated from their parents as a result of the Trump administration's "zero tolerance" policy.

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The agency provided information on how parents can go about locating a separated child, but did not provide a timeline for when families might be reunited.

President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE signed an executive order last Wednesday halting the practice of family separation. The rare reversal came after he and administration officials, for days, said only Congress could address the issue.

The Trump administration has faced overwhelming bipartisan backlash over migrant family separations, which were a direct result of the administration's policy. Democrats and Republicans alike have called family separations “cruel” and “inhumane.”

Schumer last week dismissed a legislative proposal backed by Republican leaders to keep immigrant families together at the border. He sought to keep the focus on Trump, saying he could address the issue unilaterally.

Once Trump did act, Schumer called on the administration to begin reuniting families immediately.