Sen. Lindsey Graham (R-S.C.) sent out an open letter on Friday requesting documents related to an alleged discussion between senior officials about removing President Donald Trump.

Trump has often found himself at odds with senior federal officials and he is the subject, of course, of a long-running federal investigation.

Now it appears Department of Justice (DOJ) officials reportedly, at one time, discussed whether they should remove him from office.

The Republican senator from South Carolina and chairman of the Senate Judiciary Committee wants answers about how that conversation went down.

Former FBI Acting Director Andrew McCabe alleged during an interview last month with “60 Minutes,” the CBS news magazine program, that the conversation occurred in May 2017.

Deputy Attorney General Rod Rosenstein supposedly met with McCabe and other senior Justice Department and FBI officials and discussed invoking the 25th Amendment to remove the president.

Related: Lawsuit Seeks Insight into Rosenstein’s Words During a Critical Period in 2017

“McCabe explained how Deputy Attorney General Rod Rosenstein discussed with him and others within the Department of Justice (DOJ) the possibility of removing the president of the United States by invoking the 25th Amendment,” Graham said in the letter. “In addition, Mr. McCabe described how the deputy attorney general, in a manner that was ‘absolutely serious,’ offered to wear a wire into the White House to record the president and gather evidence against him.”

Rosenstein and the other officials also allegedly discussed whether to wear wires to record conversations with the president. There are no indications currently that the idea went anywhere beyond discussion — but it has raised concerns, given the other ways senior officials have gone after the president, such as the special counsel investigation.

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“The committee is deeply concerned with these discussions and whether they essentially indicate that two of the highest ranking law enforcement officials in the United States were discussing what amounts to a coup against the president,” Graham said.

“Accordingly, the committee plans to conduct oversight into these discussions and related matters.”

Related: House Republicans Call for Perjury Investigation Against Cohen

Judicial Watch, a prominent conservative watchdog, has also been seeking records about the conversation, along with other matters. The group has been seeking records of communications from the deputy attorney general during an important few weeks back in May 2017. The group filed a lawsuit in early March claiming those record requests have been ignored.

Rosenstein appointed the special counsel to investigate Russian meddling in the 2016 presidential election. He also wrote a memo to the president recommending that former FBI Director James Comey be fired that same month.

Trump did just that soon after — but still received backlash from the Left.

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