Trump blasts 'Greatest Political Hoax of all time' ahead of Mueller report release

President TrumpDonald John TrumpDemocratic senator rips Trump's 'let them fight' remarks: 'Enough is enough' Warren warns Facebook may help reelect Trump 'and profit off of it' Trump touts Turkey cease-fire: 'Sometimes you have to let them fight' MORE on Thursday labeled special counsel Robert MuellerRobert (Bob) Swan MuellerFox News legal analyst says Trump call with Ukraine leader could be 'more serious' than what Mueller 'dragged up' Lewandowski says Mueller report was 'very clear' in proving 'there was no obstruction,' despite having 'never' read it Fox's Cavuto roasts Trump over criticism of network MORE's investigation "The Greatest Political Hoax of all time!" while lashing out at Hillary ClintonHillary Diane Rodham ClintonFarrow: Clinton staff raised concerns over Weinstein reporting Perry says Trump directed him to discuss Ukraine with Giuliani: report The Memo: Once the front-runner, Biden now vulnerable MORE, "dirty cops," and Democrats ahead of the public release of Mueller's report. 

“The Greatest Political Hoax of all time! Crimes were committed by Crooked, Dirty Cops and DNC/The Democrats,” Trump tweeted early Thursday morning.

“PRESIDENTIAL HARASSMENT!” Trump added in a second tweet.

The president went on to retweet a slew of messages from the conservative group Judicial Watch that criticized Clinton and suggested there was a conspiracy at the Department of Justice and FBI to undermine the president.

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While Trump's targeting of the Mueller investigation is nothing new, the tweets come just hours before Attorney General William BarrWilliam Pelham BarrMulvaney walks back comments tying Ukraine aid to 2016 probe Mulvaney ties withheld Ukraine aid to political probe sought by Trump Matthew Shepard's parents blast Barr's LGBTQ record in anniversary of hate crime law MORE is slated to release a redacted version of Mueller's full report to the public.

Though Barr said Trump has been cleared by Mueller on any suspicion of coordinating with the Kremlin in 2016 and that the report does not contain proof of obstruction of justice, the report is expected to contain new evidence that could be embarrassing for the White House. 

Barr is set to hold a 9:30 a.m. press conference Thursday morning before Congress will receive a redacted version of the report about 11 a.m. The rollout has sparked a firestorm of criticism from Democrats who said the administration was trying to spin the report before its release. 

“This is outrageous. The AG is supposed to be an independent beacon of truth and justice. Instead, Barr is debasing the rule of law, degrading our democratic institutions, and decimating any trust the American people have left in this Administration. #ReleaseTheReport,” tweeted Rep. Elijah CummingsElijah Eugene CummingsMichael Steele: Celebrating Elijah Cummings, a servant and a leader Republicans seek to delay effort to censure Schiff after Cummings' death House leaders offer tributes from floor to Elijah Cummings MORE (D-Md.), the chairman of the powerful House Oversight and Reform Committee.

Speaker Nancy PelosiNancy PelosiDemocratic senator rips Trump's 'let them fight' remarks: 'Enough is enough' Trump touts Turkey cease-fire: 'Sometimes you have to let them fight' Mattis responds to Trump criticism: 'I guess I'm the Meryl Streep of generals' MORE (D-Calif.) and Senate Minority Leader Charles Schumer (D-N.Y.) Thursday morning called on Mueller to testify publicly before both chambers of Congress following Barr’s “regrettably partisan handling of the Mueller report” and “indefensible plan to spin the report in a press conference later this morning.”

Updated at 8:25 a.m.