Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) said Friday that the Senate Judiciary Committee would investigate Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE remarks about an alleged proposal to use the 25th Amendment to remove President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE from office.

Graham, who chairs the Senate panel, sent a letter to Attorney General William Barr saying the committee plans to probe the allegations and offered a two-week deadline for Barr to hand over documents relating to Rosenstein's discussions with former FBI Deputy Director Andrew McCabe Andrew George McCabeGraham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' GOP votes to authorize subpoenas, depositions in Obama-era probe MORE about the alleged plan.

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

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McCabe alleged last month that senior officials discussed the possibility of removing Trump under the amendment.

McCabe made the explosive comments during a media blitz last month. He later claimed to CBS News in a "60 Minutes" appearance that Rosenstein was taking stock of which Cabinet members could support his efforts to employ the 25th Amendment.

The deputy attorney general has repeatedly denied the allegations, and reports later surfaced that he planned to resign following the allegations.

Graham said last month that he wanted to bring Rosenstein back to Capitol Hill to testify about the claims.

"Yeah, I would like to know what happened. You're having a conversation about whether or not you're going to invoke the 25th Amendment," Graham said when pressed on whether he would subpoena Rosenstein to testify if he didn't agree to appear before the panel.