What happened to Michelle King as the acting commissioner of Social Security?

Michelle King, who had been with the Social Security Administration since 1994, was serving as acting commissioner until she was abruptly forced out of office either yesterday or today. According to Lawrence O'Donnell, there is an established line of succession for acting commissioners, which stipulates that when a commissioner leaves before a Senate-confirmed replacement is in place, the deputy commissioner should become acting commissioner. However, when King was removed, this line of succession was violated. O'Donnell describes this as part of a "Musk coup at Social Security," suggesting Elon Musk's influence in these administrative changes that have raised concerns among experts familiar with Social Security operations.