President Trump renewed his attacks on the credibility of special counsel Robert Mueller's investigation in a series of Thursday morning tweets, using his oft-repeated refrain of "WITCH HUNT."

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 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!

Why it matters: Mueller's office has not issued any new indictments since July 13, when 12 Russian military intelligence officers were charged with conspiring to interfere in the 2016 presidential election. Now that the midterms are over, Mueller is again expected to begin filing indictments, according to CBS News. Roger Stone associate and former Infowars contributor Jerome Corsi said Monday he expects to be indicted by Mueller for perjury.