Graham warns Trump: Firing Mueller would be 'beginning of the end of his presidency'

Sen. Lindsey GrahamLindsey Olin GrahamOvernight Health Care: Watchdog finds Tom Price improperly used funds on flights | Ex-Novartis CEO sent drug pricing proposal to Cohen | HHS staffers depart after controversial social media posts HHS staffers depart after controversial social media posts: report Senate takes symbolic shot at Trump tariffs MORE (R-S.C.) on Sunday warned of the consequences for President TrumpDonald John TrumpReporters defend CNN's Acosta after White House says he 'disrespected' Trump with question Security costs of Trump visit to Scotland sparks outrage among Scottish citizens Ex-CIA officer: Prosecution of Russians indicted for DNC hack 'ain't ever going to happen' MORE if he tries to fire special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE.

Graham was asked on CNN's "State of the Union" if he is worried Trump is preparing to order Mueller's firing.

"If he tried to do that, that would be the beginning of the end of his presidency, because we're a rule of law nation," Graham said.

ADVERTISEMENT
Graham said Mueller is following the evidence where it takes him.

"I think it's very important he be allowed to do his job without interference and there are many Republicans who share my view," Graham said.

Trump has repeatedly dismissed the special counsel's probe into Russia's election interference and possible ties between his campaign and Russia as a "witch hunt" and has denied collusion.

Graham's comments come after Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsConservatives moving to impeach Rosenstein soon: report Senators urge DOJ to probe whether Russians posed as Islamic extremist hackers to harass US military families The Hill's Morning Report — Trump readies for Putin summit: 'He’s not my enemy’ MORE on Friday fired former FBI Deputy Director Andrew McCabeAndrew George McCabeFormer FBI lawyer Lisa Page gets closed-door grilling from House Republicans The dishonesty of the deep state 5 takeaways from wild hearing with controversial FBI agent MORE.

In recent days, Trump has taken to Twitter to attack the Mueller probe.

On Saturday, he tweeted the probe "should never have been started in that there was no collusion and there was no crime."

"It was based on fraudulent activities and a Fake Dossier paid for by Crooked Hillary and the [Democratic National Committee], and improperly used in [Foreign Intelligence Surveillance Act] COURT for surveillance of my campaign. WITCH HUNT!" Trump tweeted.

He also called McCabe's firing a "great day for the hard working men and women of the FBI."