What the hell is Mueller investigating? And why?

The special counsel statute is a very poor idea, and Mueller’s implementation of it illustrates why. The job of a special counsel (or special prosecutor, as he was formerly called) is to hang scalps on the wall. Whose scalps, or why they were taken, is incidental at best. President Trump would be fully justified in firing Robert Mueller, but a better idea, in my opinion, would be to appoint several more special counsels to look into various Democratic misdeeds. That would bring this whole farce to a screeching halt.