WASHINGTON (AP) — President Joe Biden has fired the commissioner of Social Security after the official refused to resign, and Biden accepted the deputy commissioner's resignation, the White House said.

Biden asked commissioner Andrew Saul to resign, and his employment was terminated Friday after he refused the Democratic president's request, a White House official said.

Deputy Commissioner David Black agreed to resign, said the official, who spoke on condition of anonymity to discuss personnel matters.

Both officials had been put in place under President Donald Trump, a Republican.

Biden named Kilolo Kijakazi as acting commissioner while the administration conducts a search for a permanent commissioner and deputy commissioner.

Kijakazi currently is the deputy commissioner for retirement and disability policy at the Social Security Administration.

Saul's removal followed a Justice Department legal opinion that found he could be removed, despite a statute that says he could only be fired for neglecting his duties or malfeasance.

The opinion — researched at the request of the White House — concluded that a reevaluation because of a recent Supreme Court ruling meant that Saul could be fired by the president at will.

Biden’s move got immediate support from the Democratic senator who would be in charge of confirming a successor to Saul. Republican lawmakers accused Biden of politicizing the agency and pointed to Saul's confirmation by a bipartisan Senate vote in 2019.

Senate Finance Committee Chairman Ron Wyden, D-Ore., said in a statement that “every president should chose the personnel that will best carry out their vision for the country.

“To fulfill President Biden’s bold vision for improving and expanding Social Security, he needs his people in charge,” Wyden added, pledging to work to confirm a new commissioner “as swiftly as possible.”

Rep. Bill Pascrell, D-N.J., who several months ago began demanding the ouster of Saul and Black, celebrated their Friday firings.

“Social Security is in deep trouble,” Pascrell said.

Sen. Mike Crapo of Idaho, the top Republican on the finance committee, and Rep. Kevin Brady of Texas, the top Republican on the House Ways and Means Committee, issued a joint statement calling Biden's decision “disappointing." The pair claimed “Social Security beneficiaries stand the most to lose from President Biden's partisan decision to remove Commissioner Andrew Saul.”

Senate Minority Leader Mitch McConnell, R-Ky., called the personnel move an “unprecedented and dangerous politicization of the Social Security Administration.”

The agency, headquartered in Baltimore, pays benefits, funded by a tax on wages paid by employers and employees, to about 64 million people, including retirees, children, widows and widowers, according to its website. The agency has a staff of about 60,000 employees.

Saul was confirmed by a Senate vote of 77-16 in 2019 to a six-year term that would have expired in January 2025, tweeted Sen. Chuck Grassley, R-Iowa.

The labor union that represents Social Security employees also welcomed the firings.

Ralph de Juliis, spokesperson for the American Federation of Government Employees SSA General Committee and Council 220 President, said employee morale and agency operations had suffered under Saul and Black's leadership.

“President Biden made the right call to send these Trump appointees packing,” de Juliis said.

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Associated Press writer Mike Balsamo contributed to this report.