President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate 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.

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! — Donald J. Trump (@realDonaldTrump) March 31, 2019

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Trump long railed against special counsel Robert Mueller Robert (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 Barr Bill BarrProsecutor says no charges in Michigan toilet voting display Judge rules Snowden to give up millions from book, speeches The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy 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 Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book 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.