Talk radio host Rush Limbaugh said Special Counsel Robert Mueller's investigation was a "hoax" and a waste of time from day one.

On his nationally syndicated program Monday, Limbaugh said President Trump's supporters should stop applauding that Mueller found nothing, because that validates the special counsel's investigation.

He said he understands the desire to celebrate, but he explained that the probe did not need to be validated, and it does not take a "third party" like Mueller to pronounce Trump is a legitimate president.

"It validates a hoax to applaud the fact that Mueller found nothing. There never was anything to find! There never was any collusion! There was never, ever any evidence of collusion! Therefore, there could never, ever be any evidence of obstruction of justice," Limbaugh said.

He said the infamous, unverified anti-Trump dossier -- which was funded by the Democratic National Committee and the Hillary Clinton presidential campaign -- was the "sole reason" the Russia investigation was launched, and he added it was also used to obtain FISA warrants to spy on members of the Trump campaign.

"This is the absolute, most severe political scandal that has happened in my lifetime and maybe in the nation’s history," Limbaugh said. "A phony piece of opposition research was used to get a FISA, Foreign Intelligence Surveillance Court, warrant to spy on the presidential candidate of an opposing party."

He reiterated that the dossier was never corroborated or validated, and it was used by intelligence officials in one of the nation's most hidden, secret courts to get warrants to spy on the Trump campaign that were renewed multiple times.

"I don’t know how more egregious a travesty of justice you could find than this and then the realization that everybody involved knew it."

Watch the clip above, and see more reaction to the conclusion of the Mueller probe.

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