Sen. Lindsey Graham Lindsey Olin GrahamThe Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Senate Democrats' campaign arm announces seven-figure investment to boost Graham challenger Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation MORE (R-S.C.) on Thursday suggested that former FBI Director James Comey might not be able to testify before Congress now that the Department of Justice has appointed a special counsel to investigate matters related to Russian interference in the election.

“I’m not so sure we can do it now,” he said Thursday, according to Politico.

“You’ve got a special counsel who has prosecutorial powers now, and I think we in Congress have to be very careful not to interfere.”

Members of Congress had been clamoring to hear from Comey since President Trump's abrupt firing of him last week. Since the firing, media reports have stated that Trump asked Comey to end the FBI's investigation of Michael Flynn, his former national security adviser.

Comey reportedly has memos about his conversations with Trump.

But the matter of Comey's firing is now being wrapped into the new investigation being headed by special counsel Robert Mueller — himself a former FBI director.

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Graham said the appointment of a special counsel may result in less public information being made available about Russian meddling in the 2016 presidential race.

“Public access to this is probably going to be very limited now. It’s going to really limit what the public will know about this.”

Deputy Attorney General Rod Rosenstein on Wednesday announced Mueller’s appointment Wednesday evening.

“My decision is not a finding that crimes have been committed or that any prosecution is warranted,” he said in a statement. “I have made no such determination.”

“What I have determined is that based upon the unique circumstances, the public interest requires me to place this investigation under the authority of a person who exercises a degree of independence from the normal chain of command.