Mueller is politically well-protected.
If Mueller, the FBI’s and DOJ’s gestapo-like behavior are to change at all, the protest over it will need to go well beyond the present media talking-shops and media outlet propaganda.
No he isn’t anymore. A great big iron fist has just come down on him that compelled him not to jail Flynn. He was outflanked and outgunned. You will see this to be true in the coming days. Don’t fall for Ferris Mueller’s face saving rhetoric over what just transpired.