Trump: Mueller investigation’s inner workings a ‘total mess’

President TrumpDonald John TrumpCould Donald Trump and Boris Johnson be this generation's Reagan-Thatcher? Merkel backs Democratic congresswomen over Trump How China's currency manipulation cheats America on trade MORE early Thursday morning returned to his attacks on 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, calling its inner workings "a total mess."

"The inner workings of the Mueller investigation are a total mess," he wrote in a tweet. "They have found no collusion and have gone absolutely nuts. They are screaming and shouting at people, horribly threatening them to come up with the answers they want."

"They are a disgrace to our Nation and don’t care how many lives the ruin. These are Angry People, including the highly conflicted Bob Mueller, who worked for Obama for 8 years. They won’t even look at all of the bad acts and crimes on the other side. A TOTAL WITCH HUNT LIKE NO OTHER IN AMERICAN HISTORY!" he added.

A bill to protect the special counsel's investigation into Russian election interference and possible collusion between Trump's campaign and Moscow was blocked Wednesday by Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellThe Hill's Morning Report: Trump walks back from 'send her back' chants GOP rattled by Trump rally Third Kentucky Democrat announces challenge to McConnell MORE (R-Ky.), who said earlier in the day that there was no threat to Mueller from the president.

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Democrats, and some Republicans, called for the legislation to be passed in the wake of Trump ousting Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsHouse gears up for Mueller testimony Trump's no racist — he's an equal opportunity offender Press: Acosta, latest to walk the plank MORE last week and replacing him with acting Attorney General Matthew Whitaker, Sessions's former chief of staff.

Whitaker in a 2017 interview said that there was “no collusion” between the Trump campaign and Russia, adopting a favorite line from the president. 

Mueller, a registered Republican who was appointed to head the FBI by former President George W. Bush in 2001, was reported earlier this week to be close to issuing a new set of indictments in the case.