Since the early days of Mr. Trump’s second term, the president’s aides have repeatedly sought to fire, punish or demote the people who worked on the cases against him as well on cases stemming from the attack on the Capitol by his supporters on Jan. 6, 2021.

The purging from government ranks of anyone associated with these cases has been sporadic, with fresh batches of firings coming at different intervals and often without much explanation, other than the citing of Article II of the Constitution, which defines the powers of a president.

More dismissals were expected, according to the people familiar with the matter, but Todd Blanche, the deputy attorney general, has been pushing to stop additional firings, according to a person familiar with the situation who spoke on condition of anonymity because they were not authorized to discuss internal deliberations.

Earlier this month, Attorney General Pam Bondi sent letters of dismissal to three prosecutors in the U.S. attorney’s office in Washington who had helped to supervise the investigation into Jan. 6, which was the largest criminal inquiry in the Justice Department’s history.

A longtime spokeswoman for the U.S. attorney’s office, Patricia Hartman, also was recently fired.

Those moves came nearly five months after several prosecutors who had worked on prominent Jan. 6-related cases against the far-right extremist groups the Proud Boys and the Oath Keepers were demoted to handling low-level criminal cases.