A Justice Department official said Deputy Attorney General Rod Rosenstein is expected to leave his position in the middle of March.
The official was not authorized to discuss the move by name and spoke to The Associated Press on condition of anonymity on Monday night, Feb. 18.
The White House is expected to name a replacement for Rosenstein this week.
Rosenstein’s departure had been expected with the confirmation of William Barr as attorney general last week.
Rosenstein has been on the job for nearly two years.
Most recently, President Trump accused Rosenstein, along with former FBI Deputy Director Andrew McCabe, of pursuing an “illegal and treasonous” plot against him after McCabe detailed private DOJ discussions about secretly recording and potentially ousting the president.
“He and Rod Rosenstein, who was hired by Jeff Sessions, look like they were planning a very illegal act, and got caught,” the president had in a tweet early Monday.
Trump continued: “There is a lot of explaining to do to the millions of people who had just elected a president who they really like and who has done a great job for them with the Military, Vets, Economy and so much more. This was the illegal and treasonous ‘insurance policy’ in full action!”
Rosenstein oversaw special counsel Robert Mueller’s investigation after then-Attorney General Jeff Sessions recused himself. Barr will now oversee the remaining work in Mueller’s investigation into potential collusion between the Kremlin and the Trump campaign and decide how much Congress and the public know about its conclusion.