One week after President Trump fired the head of the National Archives and Records Administration, the second-in-command, the deputy archivist, has informed colleagues of his intent to retire, a source familiar with the situation confirmed to CBS News Friday.

William “Jay” Bosanko served as chief operating officer for the National Archives when the FBI served a search warrant on Mar-a-Lago in August 2022 in order to seize boxes of Trump records, including classified material, that the agency said had not been properly transferred to the Archives at the conclusion of Mr. Trump’s first term.

According to two sources familiar with the situation, Bosanko was pushed out by Jim Byron, a 31-year old who was recently president of the Richard Nixon Foundation. Byron delivered Bosanko an ultimatum: Resign now or be fired next week.

Reached by phone Friday evening, Byron declined to comment.

Byron has been working out of the Archives’ offices as a political appointee representing the White House. Byron has often described himself as a mentee of Hugh Hewitt, an ardent pro-Trump commentator who preceded Bryon as head of the Nixon Foundation and who now sits on its board. (The Nixon Foundation and the Archives have occasionally been in conflict with each other, which often happens with presidential foundations and the government agency that oversees presidential libraries, according to an Archives source.)

The first notice to staff came in an email Friday from Deputy Archivist William J. Bosanko, who told members of his team that he was retiring and that it had been “a privilege and an honor to work” at the Archives for the last 32 years.