President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE on Wednesday called on Republicans to “take control” of the investigation into whether his campaign colluded with Russia and labeled the ongoing probe the “single greatest Witch Hunt in American history.”

“There was no collusion, everybody including the Dems knows there was no collusion, & yet on and on it goes. Russia & the world is laughing at the stupidity they are witnessing. Republicans should finally take control!” Trump tweeted.

The single greatest Witch Hunt in American history continues. There was no collusion, everybody including the Dems knows there was no collusion, & yet on and on it goes. Russia & the world is laughing at the stupidity they are witnessing. Republicans should finally take control! — Donald J. Trump (@realDonaldTrump) January 10, 2018

Trump has repeatedly labeled 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 a witch hunt and has denied colluding with Russia during the presidential race. Last month Trump said even if there was collusion, “it’s not a crime.” He has also suggested the FBI instead investigate his 2016 opponent, Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE.

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In a tweet earlier Wednesday, Trump lashed out at Sen. Dianne Feinstein Dianne Emiel FeinsteinMcConnell says Trump nominee to replace Ginsburg will get Senate vote Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Intensifying natural disasters do little to move needle on climate efforts MORE (D-Calif.) for unilaterally releasing the full transcript of an interview between congressional investigators and the co-founder of the opposition research firm that commissioned a controversial dossier on Trump during the 2016 campaign.

Democrats have claimed the dossier to be a roadmap to alleged collusion and corruption by Trump and his officials, while Republicans insist that it is full of unverified claims that the FBI might have used to improperly secure a warrant to spy on Trump’s campaign and transition.

Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa), who chairs the Senate Judiciary Committee, said he's not sure what the president had in mind with his comments, adding that he doesn’t plan to follow up with Trump on the matter.

“I don’t intend to have a discussion with the president on that point and I hope he doesn’t call me and tell me the same thing that you said he said,” Grassley told CNN’s Manu Raju on Wednesday when told about Trump's tweet.

Grassley: “I don't know what the President has in mind ... and I don't intend to have a discussion with the President on that point, and I hope he doesn't call me and tell me the same thing that you said he said." https://t.co/85mvCLnodv — Manu Raju (@mkraju) January 10, 2018

The Judiciary Committee is one of several congressional committees conducting separate investigations into Russian meddling in the 2016 election.

Some GOP lawmakers have in recent weeks accused the Mueller probe of bias against the president, citing anti-Trump text messages sent by a former member of Mueller's team.

It was recently reported that Trump’s team is discussing options for a possible interview with Mueller in the coming weeks.

Mueller’s investigation has thus far led to two indictments and two guilty pleas.

Former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE and his former associate, Richard Gates, were indicted on money laundering and tax fraud charges, among others.

Former White House national security adviser Michael Flynn and former Trump campaign policy adviser George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE pleaded guilty to lying to the FBI.

Updated: 11:57 am.