Sen. Lindsey Graham Lindsey Olin GrahamSenate Republicans face tough decision on replacing Ginsburg Democratic senator calls for eliminating filibuster, expanding Supreme Court if GOP fills vacancy What Senate Republicans have said about election-year Supreme Court vacancies MORE (R-S.C.) said on Sunday that fired FBI Director James Comey should be held accountable if he acted on Russian intelligence he knew to be fake during the FBI's investigation into Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE's emails.

"If he intervened in the election based on fake information generated by the Russians, that was an incredibly incompetent thing to do. So I don’t know who to believe anymore," Graham said on CNN's "State of the Union."

"That to me is a stunning story," he added. "From a Congress point of view, he never told us it was fake, so he needs to be held accountable."

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CNN reported on Friday that false intelligence had prompted Comey to publicly declare last summer that the Clinton email probe was over and to recommend against charging the former secretary of state.

In spite of the fact that he knew that intelligence was fake, Comey reportedly feared that, if the information were to become public, it could devastate the credibility of the FBI and the Department of Justice.

Reportedly, Comey worried that, if the intelligence was leaked, the FBI would not be able to discredit it without undermining U.S. intelligence sources and methods.

Graham, however, said he should have told members of Congress that the intelligence was fake, arguing that Comey ultimately sought to go around the lawmakers charged with overseeing his agency.

"If he did in fact believe it was fake, he should have shared that with the Congress because we have oversight over him," Graham said.