George Washington University Law Professor Jonathan Turley said former FBI Director Robert Mueller being named special counsel in the Trump-Russia probe is a "healthy dose of Tylenol" for the country.

The constitutional scholar said the appointment of Mueller to lead the investigation will "bring this fever down," but also cautioned it will "prolong the sickness" by potentially taking years to reach a conclusion.

Turley said that until Mueller was named, President Trump could not fully clear his name in the face of ongoing leaks and allegations.

The appointment of a special counsel was "almost inevitable when the Comey memo hit," Turley said.

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Mueller, who served under President George W. Bush, was named special counsel by Deputy Attorney General Rod Rosenstein.

"This may be the price of hubris," he said. "The deputy attorney general gave the country a healthy dose of Tylenol."

Turley said he didn't think a special counsel was needed in the case until Trump fired FBI Director James Comey.

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