President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE focused early on Sunday on 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 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."

ADVERTISEMENT

"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

....Hoax. My campaign was being seriously spied upon by intel agencies and the Democrats. 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! — Donald J. Trump (@realDonaldTrump) May 12, 2019

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 Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment 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 Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.), responded by voting to hold Barr in contempt.