The GOP is mute because the GOP leaders don’t think they have the mandate to move on this problem. They also are psychologically handicapped, fearing the left will again brand them fascists if they try to do anything to the FedGov behemoth.
No, it’s worse than that. GOP leaders are as corrupt as Dem leaders but Dem leaders get a pass from FBI/DOJ since they are same Party as FBI/DOJ but GOP leaders must fear exposure from FBI/DOJ. It’s political blackmail.