Comey running around writing books and holding forth on everything strongly suggests that Rosenstein and Mueller gave him broad immunity, probably the first thing they did upon Mueller’s appointment.
It appears the underlings didn’t get the same comfy pillow treatment.
Go back to Comey’s memos. Trump asked him about McCabe...more than once. Comey said he was a great guy and the President would like him. Trump, asked him again...You’ll love him.
It also means that McCabe doesn’t have pardon dated January 19, 2017, in a safety deposit box somewhere.