Supreme Court Justice Clarence Thomas is facing criticism over his decision to temporarily freeze an order from a lower court that required Republican Senator Lindsey Graham to testify in front of a grand jury investigating the efforts to overturn the results of the 2020 election in Fulton County, Georgia.

The move from Thomas, who did not refer the case to the full bench and acted alone in the decision, prompted calls for his impeachment and accusations that the top judge was acting anti-democratically.

"Hard to overstate how antidemocratic and delegitimizing this move is. The husband of a key insurrectionist blocks the testimony of a key witness in an election interference probe," activist Max Berger tweeted on Monday. "Democrats should launch impeachment proceedings against Clarence Thomas. He's not fit to serve."

Earlier in the day, Thomas agreed to freeze the order on Graham, whose legal team argued he could not be questioned about his calls to Georgia Secretary of State Brad Raffensperger and his staff because they were part of his work as a senator and that answering any such questions is unconstitutional under the speech or debate clause that protects legislators from certain law enforcement actions connected to those duties.

Graham filed the request to Thomas, who has jurisdiction over emergency matters from Georgia, on Friday.