I've argued elsewhere (maybe here, too) that Comey should be told quietly but in no uncertain terms that his position is untenable and he needs to resign. Firing him, if it comes to that, would have to be done very carefully.
Ahh, so it's not at the pleasure of the president like most appointments.
Alex
"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."