AP
"This doesn't add up, and I smell a rat here," Graham said on Fox News.
Last week, Graham and fellow Republican Sen. Chuck Grassley said they reviewed interview transcripts revealing that Comey may have started to draft an "exoneration statement" for Clinton before the FBI could conduct an interview for Clinton and her associates.
The transcripts, from interviews conducted by the federal watchdog Office of Special Counsel, led Graham to question whether Comey had "predetermined the result" of the investigation on Clinton.
A Judiciary Committee review showed that Comey started writing the statement in April or May 2016, the Washington Examiner reported. However, it wasn't until July that Comey announced that "no reasonable prosecutor would bring such a case" and that he would not be pursuing charges against Clinton.
Graham did note that he didn't believe Comey perjured himself, Fox
"He needs to come back to committee," Graham said.
President Donald Trump blasted the revelation of the interview transcripts last week by calling it "a rigged system."
"Wow, looks like James Comey exonerated Hillary Clinton long before the investigation was over...and so much more. A rigged system!" Trump tweeted.