President TrumpDonald John TrumpNFL players stand in tunnel during anthem, extending protests 12 former top intel officials blast Trump's move to revoke Brennan's security clearance NYT: Omarosa believed to have as many as 200 tapes MORE's eldest son on Friday night declared that the ongoing probe into ties between the Trump campaign and Russia during the presidential contest is a "witch hunt."

“Obviously, this has been a witch hunt, probably the greatest since the Salem witch trials,” Donald Trump Jr.Donald (Don) John TrumpSan Francisco ethics official sues Secret Service over Trump Jr. trip to India Spicer slams Omarosa on WH recordings: 'She will do anything to further her own being' White House staff offered discounts at Trump's NJ golf club: report MORE told Fox News's Tucker Carlson. 

“The interesting thing about it is the only collusion, the only shadiness, the only thing that has been discovered is what the prior administration, the [Democratic National Committee] and all of them have done," he asserted.

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The comments follow a push by Republicans for the release of a memo that GOP lawmakers say will reveal high-level government abuse surrounding the probe into allegations of collusion between the Trump campaign and Russia's election meddling.

Trump Jr. has become a subject in the federal and congressional probes into the matter due to his June 2016 meeting with a Russian lawyer and other campaign officials at Trump Tower.

Emails revealed the president's son agreed to the meeting after he was told he would receive damaging information on then-Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonPapadopoulos's wife wants him to scrap plea deal with Mueller: report FBI chief: I'm trying to bring 'normalcy' in 'turbulent times' Senate Intel chief slams ex-CIA director for timing of claims about Trump-Russia ties MORE

President Trump has referred to the probe as "the greatest witch hunt in American political history."