"They have found no collusion and have gone absolutely nuts". He added that the investigators are threatening Americans to provide the answers they want.
The US president has previously said the special counsel investigation led by Mr Mueller, who is a highly regarded former head of the FBI and a Republican, was unfair and dominated by "hardened Democrats".
Trump's latest attacks come as he and his lawyers put the finishing touches on their answers to a set of written questions from Mueller. They won't even look at all of the bad acts and crimes on the other side.
"They are a disgrace to our Nation and don't care how many lives (they) ruin".
Trump's vitriol appears to be incited, he argued, by a new perceived threat from the special counsel. Sessions was the first major political figure to support Trump in the 2016 election, but also had met with Russia's then-ambassador to Washington in the run-up to the voting two years ago.
Warner also said that Congress still had a lot of work to do in relation to the Russian Federation probe.More news: Major oil producers foresee oversupply, edge closer to production cuts
There's another potential explanation for Trump's tweet that doesn't require him having any insider knowledge.
In 2016, USA intelligence agencies concluded that Russian Federation had used a state-authorised campaign of cyber attacks and fake news stories planted on social media in an attempt to turn the election against Democrat candidate Hillary Clinton. It's possible that Trump is simply extrapolating from this reporting - or he may have heard similar details from a source who is the same as or related to ABC News' source.
Federal prosecutor Dan Goldman suggested that Trump's anxiety is growing because of the coming indictments.
Rubio, Boot complained, has been "transformed in Donald Trump's image".
Corsi is one of more than a dozen individuals connected to Stone that Mueller's team is reportedly probing.
Fox News Senior Judicial Analyst Judge Andrew Napolitano said Wednesday it was incredible that the Justice Department reached back to a short-term Reconstruction-era presidential appointment to legitimize President Trump's decision to make former Iowa federal prosecutor Matt Whitaker the acting US attorney general.
Trump's legal team has asked him to refrain from criticizing Mueller and the Russian Federation investigation on Twitter, and the president laid off in the period before the November midterm elections.