President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE said early Thursday that he "had nothing to do with Russia helping me get elected" while slamming 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 Russia investigation in a series of tweets.

“After spending $40,000,000 over two dark years, with unlimited access, people, resources and cooperation, highly conflicted Robert Mueller would have brought charges, if he had ANYTHING, but there were no charges to bring!” he said in his first tweet of the morning.

The Greatest Presidential Harassment in history. After spending $40,000,000 over two dark years, with unlimited access, people, resources and cooperation, highly conflicted Robert Mueller would have brought charges, if he had ANYTHING, but there were no charges to bring! — Donald J. Trump (@realDonaldTrump) May 30, 2019

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"Russia has disappeared because I had nothing to do with Russia helping me to get elected. It was a crime that didn’t exist," he said in a subsequent tweet.

"So now the Dems and their partner, the Fake News Media, say he fought back against this phony crime that didn’t exist, this horrendous false accusation, and he shouldn’t fight back, he should just sit back and take it," he added.

"Could this be Obstruction? No, Mueller didn’t find Obstruction either."

Russia, Russia, Russia! That’s all you heard at the beginning of this Witch Hunt Hoax...And now Russia has disappeared because I had nothing to do with Russia helping me to get elected. It was a crime that didn’t exist. So now the Dems and their partner, the Fake News Media,..... — Donald J. Trump (@realDonaldTrump) May 30, 2019

Trump’s tweet appeared to be his first acknowledgement of the U.S. intelligence community's conclusion that Russia interfered in the 2016 election in order to help his campaign.

Moments later, the president contradicted his tweet, telling reporters outside the White House that "Russia did not get me elected."

Mueller wrote in his final report earlier this year that he found insufficient evidence to find Trump's campaign conspired with Russia in its efforts to interfere in the 2016 election, but declined to make a prosecutorial judgment over whether the president obstructed subsequent probes.

Mueller said on Wednesday that his office did not charge Trump with a crime because it “was not an option” under Department of Justice regulations.

Mueller, in his first public comments on his two-year investigation, said that it would have been impossible to bring Trump to court, adding that his final report clearly spelled out that investigators did not conclude that the president was innocent of a crime.

“If we had confidence that the president clearly did not commit a crime, we would have said that,” Mueller said. “We did not, however, make a determination as to whether the president did commit a crime.”

While Mueller said that he did not wish to testify publicly before Congress about his conclusions, he appeared to shift the onus for further action onto the House, saying “the Constitution requires a process other than the criminal justice system to formally accuse a sitting president of wrongdoing.”

His remarks stirred up an ongoing debate within the Democratic Party over whether it should begin impeachment proceedings in the House, a move the White House has said would be unjust and politically motivated.

A slew of Democrats running for president next year ramped up their calls for impeachment in the hours after Mueller spoke, though Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) issued a statement devoid of any mention of the prospect, simply saying Congress would continue its oversight duties.

“The Congress holds sacred its constitutional responsibility to investigate and hold the President accountable for his abuse of power. The Congress will continue to investigate and legislate to protect our elections and secure our democracy. The American people must have the truth,” she said.

Updated at 8:51 a.m.