Graham: Mueller is going to be allowed to finish investigation

Sen. Lindsey GrahamLindsey Olin GrahamHouse Judiciary Committee to hold hearing on police brutality next week McCabe, Rosenstein spar over Russia probe Rosenstein takes fire from Republicans in heated testimony MORE (R-S.C.) said Sunday that special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe into alleged collusion between the Trump campaign and Russia will finish unimpeded.

"Nothing's going to happen to Mueller's investigation politically. He's going to be allowed to finish it," Graham told CBS's "Face the Nation."

"I'm intent on making sure that Mueller completes his investigation without political interference," he added. 

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However, Graham said he was concerned about others involved in the initial stages of the Russia probe.

"I'm very disappointed no Democrats seem to be worried about the corruption at the Department of Justice and the FBI regarding the Clinton email investigation, early stages of the Russian investigation," Graham said. "I'm worried about that."

He also expressed very little confidence that Mueller would find any evidence of collusion.

"I know that from the Judiciary point of view, we found no evidence of collusion between the Trump campaign and the Russians," Graham said. "I think [Sen.] Richard BurrRichard Mauze BurrTrump asserts his power over Republicans FISA 'reform': Groundhog Day edition Rubio: Coronavirus conspiracy theories could be used in foreign election misinformation campaigns MORE [R-N.C.] said from the Intel point of view that he's seen no evidence of collusion, but we're waiting on Mueller."

"Let's let Mueller do his job," Graham said.

President TrumpDonald John TrumpFormer employees critique EPA under Trump in new report Fired State Department watchdog says Pompeo aide attempted to 'bully' him over investigations Virginia senator calls for Barr to resign over order to clear protests MORE and his Republican allies on Capitol Hill have repeatedly expressed that they want the Mueller probe to end, fueling concern among Democrats that the GOP is trying to impede the investigation.

Last Thursday, Trump told Bloomberg News that he considered the investigation "illegal," a statement the president doubled down on Sunday morning.

"The illegal Mueller Witch Hunt continues in search of a crime," Trump tweeted out. "There was never Collusion with Russia, except by the Clinton campaign, so the 17 Angry Democrats are looking at anything they can find."

"ALSO, not allowed under the LAW," he said.