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

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 on Thursday labeled 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 "The Greatest Political Hoax of all time!" while lashing out at Hillary ClintonHillary Diane Rodham ClintonTrump complains of 'fake polls' after surveys show him trailing multiple Democratic candidates Hillary Clinton responds to Trump tweets telling Dem lawmakers to 'go back' to their countries The Young Turks' Cenk Uygur: Here's how to choose a president 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 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 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 CummingsAppeals court asks DOJ to weigh in on Trump congressional subpoena fight Four heated moments from House hearing on conditions at border facilities Border Patrol chief was member of secret Facebook group for agents: report MORE (D-Md.), the chairman of the powerful House Oversight and Reform Committee.

Speaker Nancy PelosiNancy PelosiNYT's Friedman repeatedly says 's---hole' in tirade against Trump on CNN GOP lawmaker: Trump's tweets 'obviously not racist' On the USMCA, Pelosi can't take yes for an answer 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.