President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE early Thursday morning returned to his attacks on 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, 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."

The inner workings of the Mueller investigation are a total mess. 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... — Donald J. Trump (@realDonaldTrump) November 15, 2018

"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.

....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! — Donald J. Trump (@realDonaldTrump) November 15, 2018

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 McConnell Addison (Mitch) Mitchell McConnellFEC flags McConnell campaign over suspected accounting errors Poll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ky.), who said earlier in the day that there was no threat to Mueller from the president.

ADVERTISEMENT

Democrats, and some Republicans, called for the legislation to be passed in the wake of Trump ousting Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status 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.