The move is a significant expansion of the Justice Department’s investigation into the state’s leaders, including Gov. Tim Walz and Mayor Jacob Frey of Minneapolis.
Mayor Jacob Frey of Minneapolis at a news conference this month. The Trump administration’s investigation was initially said to have focused on him and Gov. Tim Walz of Minnesota.
For weeks, judges have pressed Ms. Halligan to explain why she continues to identify herself in court filings as the U.S. attorney, despite a ruling in November that she was unlawfully appointed to the job.
Judges took the extraordinary step of publicly appealing for applicants to replace Lindsey Halligan, whose short tumultuous tenure was marred by significant missteps in court.
Jacob Frey, the mayor of Minneapolis, at a news conference this month. He and Gov. Tim Walz of Minnesota are being investigated by the Justice Department, according to a senior law enforcement official.
It is exceedingly rare, even in investigations of the unauthorized disclosure of classified information, for federal agents to search a reporter’s home.