Isn't the President is already looking for a new Attorney General? If so, then I don't really see why this is necessary even if you believe Ben deserves to be impeached. It seems kind of like yelling "don't let the door hit you on the way out" and don't think he deserves that sort of treatment even if I would liked to have seen him be more active.
Ben has not resigned. If he'd like to do so, I'd be willing to drop this, but until then, this stands. He should be removed from office for egregious neglect of his duties.