Musk asked a federal judge to throw out the settlement this week, the WSJ reported, in a motion filed in Manhattan federal court.

Musk's lawyers argued that the settlement, which famously required Musk to run his Tweets past a "Twitter sitter" as a consequence of faking an $80 billion buyout for Tesla, "has become unworkable".

And in a sign that the SEC is currently a fly in Musk's ointment, his lawyers said that the regulator was using the settlement to make "round after round of demands for voluminous, costly document productions, with no signs of abatement."

Additionally, Musk called into question the SEC's original claims that he defrauded shareholders in 2018. 

"I never lied to shareholders. I would never lie to shareholders. I entered the consent decree for the survival of Tesla, for the sake of its shareholders," Musk said, claiming he felt "pressured" to settle with the SEC and put the matter behind him.