Trump: 'Witch Hunt ... must never be allowed to happen again!'

President TrumpDonald John TrumpCNN's Camerota clashes with Trump's immigration head over president's tweet LA Times editorial board labels Trump 'Bigot-in-Chief' Trump complains of 'fake polls' after surveys show him trailing multiple Democratic candidates MORE focused early on Sunday on 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 Russia's interference, calling it a "witch hunt" and saying it "must never be allowed to happen again." 

"Think of it," Trump tweeted amid a battle over Mueller's report. "I became President of the United States in one of the most hard fought and consequential elections in the history of our great nation."

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"From long before I ever took office, I was under a sick & unlawful investigation concerning what has become known as the Russian Hoax," he continued in a separate tweet. "This never happened before in American history, and it all turned out to be a total scam, a Witch Hunt, that yielded No Collusion, No Obstruction."

"This must never be allowed to happen again!" he added

The comments from Trump come weeks after Mueller's report on his investigation into Russia's interference and whether the president committed obstruction of justice was released in a redacted form. 

Mueller's investigation did not uncover evidence to conclude that a conspiracy took place between Trump's 2016 campaign and Moscow. However, the report noted that Mueller could not make a conclusive determination in regard to whether Trump obstructed justice. 

Democratic lawmakers have vowed to further investigate Trump on matters related to collusion, among other things. But the Trump administration has been resistant to these efforts. 

Attorney General William BarrWilliam Pelham BarrACLU says it will 'sue swiftly' over Trump administration ending asylum protections Trump to end asylum protections for most Central American migrants at US-Mexico border This week: House Dems voting to hold Barr, Ross in contempt MORE last week failed to comply with a congressional subpoena for Mueller's full, unredacted report and underlying documents. The House Judiciary Committee, chaired by Rep. Jerrold NadlerJerrold (Jerry) Lewis NadlerTrump knocks Mueller after deal struck for him to testify House Democrats request briefing on Epstein, Acosta Nadler apologized after repeatedly calling Hope Hicks 'Ms. Lewandowski' at hearing MORE (D-N.Y.), responded by voting to hold Barr in contempt.