It's just his latest in a series of many clashes with the US Securities and Exchange Commission.
He reportedly wants to tie up less of his own wealth with the deal.
Musk has publicly attacked a number of high-profile Twitter staff.
"I don't want anyone who comes into my restaurant to forget that day."
The US President's account was locked until the tweet was removed.
It will also block URLs associated with the group from being shared on the platform.