WATCH: Republican Ron Johnson calls Democrat Gary Peters a liar before Senate hearing

Johnson was criticizing the Democrats, including Peters, of disseminating disinformation while accusing Republicans of spreading Russian disinformation.

"I just have to talk about Russian disinformation because the people pedaling it are not on my side of the aisle," Johnson said.

"Senior Democrat leaders, including ranking member Peters, were involved in a process of creating a false intelligence product that was mostly classified."

"They leaked to the media, that accused Senator Grassley, the President pro tem of the Senate, and myself, of accepting and disseminating Russian disinformation from Andrii Derkach," Johnson continued. He insisted that he had never even heard of Andrii Derkach prior to being accused of such actions.

Derkach was sanctioned by the US Treasury Department in September of this year "for attempting to influence the US electoral process."

Johnson then turned his attention to the Hunter Biden investigation. "50 people associated with the intelligence community after our Hunter Biden investigation and the revelations of the Hunter Biden computer said, 'Oh, this is Russian disinformation,'" Johnson complained. "Now we find out, no, it's a real investigation by the Justice Department."

"Hillary Clinton's campaign, the DNC, the Steele dossier, the ranking member Peters, accusing Senator Grassley and I of disseminating Russian disinformation, that’s where the disinformation is coming," Johnson insisted.

While Johnson then attempted to hand the floor over to fellow Republican Senator Rand Paul, Peters interrupted insisting that he has "got to respond to that."

"Try," Johnson dared Peters.

Peters insisted that he had "nothing to do" with the report Johnson was referencing, to which Johnson responded that Peters has "lied repeatedly."

"You lied repeatedly in the press that I was spreading Russian disinformation, and that was an outright lie. And I told you to stop lying and you continued to do it," Johnson said belligerently. He then once again unsuccessfully attempted to hand the floor to Senator Paul.

"Mr. Chairman, this is not about airing your grievances," Peters said. "You can't make these false allegations and then drop it at there… This is terrible what you’re doing to this committee and all the great work that you talked about."

"It is what you have done to this committee," Johnson clapped back.

"Falsely accusing the Chairman of spreading disinformation, nothing could have been further from the truth and you’re spouting it again, which is why I had to respond," Johnson finished.

Peters described the allegations from Johnson as "outrageous."

Widespread claims of spreading Russian disinformation were levelled at Republicans following President Donald Trump's victory in the 2016 election, leading to a special counsel investigation which distracted the administration for two years.

While the Russian government did indeed attempt to sow discord in the 2016 election, there is no evidence that the actions of the Russian government changed the results of the election.

Despite a long and arduous investigation, no evidence of collusion between the Trump campaign and the Russian government was found.