Attorney General Jeff Sessions informed the White House that he may resign from his post in the event that President Trump fires Deputy Attorney General Rod Rosenstein, according to a new report.

Sessions notified White House counsel Don McGahn of this during a phone call last weekend, sources told the Washington Post.

During the phone call, Sessions sought information about a meeting between Trump and Rosenstein and was relieved to hear that the meeting was primarily pleasant, and mentioned that he would have to weigh resigning if Trump fired Rosenstein, a person familiar with the call told the Post.

Although Sessions’ comments were not intended to serve as a warning to the White House, they were an attempt to demonstrate the implications of removing Rosenstein, another person familiar with the call added.

The call followed an FBI raid at the home and office of President Trump’s personal lawyer Michael Cohen —which escalated tensions between the White House and the Justice Department.

Rosenstein reportedly authorized the raid, which was overseen by the U.S. attorney’s office for the Southern District of New York. Rosenstein is also overseeing special counsel Robert Mueller’s Russia probe, which Trump has repeatedly called a “witch hunt.”

Following the raid, reports emerged that Trump was considering terminating Rosenstein, and potentially Sessions.

Publicly, Trump condemned the raise and called it a “disgrace” as he singled out federal investigators.

During a press conference at Mar-a-Lago on Wednesday, Trump said that despite reports over the last few months indicating he is going to fire Mueller and Rosenstein, “They're still here.”