Fired all 46 attorney generals hired by Obama
U.S. attorneys are normally replaced at the beginning of new administrations. Of the 93 U.S. attorneys, 46 remain from the past administration, according to the Department of Justice (DOJ).
Sessions asked for the federal prosecutors to resign "in order to ensure a uniform transition," DOJ spokeswoman Sarah Isgur Flores said in a statement.
“As was the case in prior transitions, many of the United States Attorneys nominated by the previous administration already have left the Department of Justice," the spokeswoman said.
The DOJ said career prosecutors in Sessions' office would continue investigations and prosecutions until the new U.S. attorneys are confirmed.
The call for resignations applies to all Senate-confirmed U.S. Attorneys, including Preet Bharara, the U.S. attorney for the Southern District of New York.
That comes as a surprise, as Bharara reportedly met with Trump after the election and agreed to remain in his position during the Trump administration. Sessions also asked him to stay, the prosecutor told The New York Times.
Once the resignations are submitted, it would be Trump's decision on whether to accept all of them.