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

President TrumpDonald John TrumpJoint Chiefs chairman denies report that US is planning to keep 1K troops in Syria Kansas Department of Transportation calls Trump 'delusional communist' on Twitter Trump has privately voiced skepticism about driverless cars: report MORE early Thursday morning returned to his attacks on special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe 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 McConnellRepublicans up for reelection fear daylight with Trump Overnight Energy: Students around globe demand climate action | EPA bans consumer sales of deadly chemical in paint strippers | Green New Deal set for Senate vote The Hill's Morning Report — Trump readies first veto after latest clash with Senate GOP 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 SessionsO'Rourke on impeachment: 2020 vote may be best way to 'resolve' Trump House Judiciary Dem, Republican clash over details of Whitaker testimony DeVos moves to allow religious groups to provide federally funded services to private schools 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.