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

President TrumpDonald John TrumpEsper sidesteps question on whether he aligns more with Mattis or Trump Warren embraces Thiel label: 'Good' As tensions escalate, US must intensify pressure on Iran and the IAEA 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.

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Trump long railed against special counsel Robert MuellerRobert (Bob) Swan MuellerTop Republican considered Mueller subpoena to box in Democrats Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump 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 BarrWilliam Pelham BarrThe Hill's Morning Report - Presented by JUUL Labs - House to vote to condemn Trump tweet House poised to hold Barr, Ross in contempt Harris campaign accepts money from partners of law firm she criticized over Epstein case 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 RosensteinFeds will not charge officer who killed Eric Garner The Hill's Morning Report — Trump retreats on census citizenship question Judiciary issues blitz of subpoenas for Kushner, Sessions, Trump associates 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.