Trump says 'phony and fraudulent' Russia investigation 'should never' happen again

President TrumpDonald John TrumpUSPS warns Pennsylvania mail-in ballots may not be delivered in time to be counted Michael Cohen book accuses Trump of corruption, fraud Trump requests mail-in ballot for Florida congressional primary MORE said Sunday that the "phony and fraudulent" Russia investigation "should never" be able to happen to another president.

"Everybody is asking how the phony and fraudulent investigation of the No Collusion, No Obstruction Trump Campaign began. We need to know for future generations to understand. This Hoax should never be allowed to happen to another President or Administration again!" Trump said in a tweet.

ADVERTISEMENT

Trump long railed against special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation into Russian interference in the 2016 election. While it was ongoing, Trump often referred to the probe as a "hoax" and a "witch hunt."

Last week, Attorney General William BarrBill BarrHillicon Valley: 'Fortnite' owner sues Apple after game is removed from App Store | Federal agencies seize, dismantle cryptocurrency campaigns of major terrorist organizations Federal agencies seize, dismantle cryptocurrency campaigns of major terrorist organizations How would a Biden Justice Department be different? MORE said in a letter to lawmakers summarizing Mueller's report that Mueller determined the Trump campaign did not coordinate with Russia ahead of the election. Mueller did not decide whether Trump obstructed justice, but Barr and Deputy Attorney General Rod RosensteinRod RosensteinFBI officials hid copies of Russia probe documents fearing Trump interference: book Sally Yates to testify as part of GOP probe into Russia investigation Graham releases newly declassified documents on Russia probe MORE determined that he did not.

Trump previously said that an investigation similar to the Russia should probe should never happen again to another president. 

"This should never happen to a president again. We can’t allow that to take place," he said last week

Republicans in Congress have called for investigations into the origins of the Russia investigation and argued that the results invalidate the necessity of the probe.