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.) on Sunday pledged to thoroughly investigate comments from 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 after the former FBI deputy director told "60 Minutes" that Justice Department officials discussed a plan to potentially 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.

"We're going to find out what happened here and the only way I know to find out is to call the people in under oath and find out, through questioning, who's telling the truth because the underlying accusation is beyond stunning," Graham said on "Face the Nation."

Graham, the chairman the of the Senate Judiciary Committee, reiterated that he intends to subpoena McCabe and 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 to testify before the panel if they won't agree to do so voluntarily.

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The senator downplayed the notion that an investigation into the FBI will further damage the bureau's credibility.

"There is no organization beyond scrutiny," he said. "There is no organization that can't withstand scrutiny. And the FBI will come out stronger."

"But we've got to get to the bottom of it," he continued. "What are people to think after they watch '60 Minutes' when they hear this accusation by the acting deputy — acting FBI director that the deputy attorney general encouraged him to try to find ways to count votes to replace the president? That can't go unaddressed."

CBS News reported that McCabe said in a "60 Minutes" interview that there were conversations among Justice Department officials about the possibility of removing Trump via the 25th Amendment, and that Rosenstein had offered to wear a wire around the president.

The Justice Department issued a statement in response reiterating Rosenstein's denial of the claim calling McCabe's account "inaccurate and factually incorrect."

The discussions had previously been reported by The New York Times.

McCabe has since walked back his remarks, with a spokesperson issuing a statement that he did not "participate in any extended discussions about the use of the 25th Amendment, nor is he aware of any such discussions."