The "unprecedented and unheard of" actions of FBI Director Comey, in what many believe to be partisan interference in an election, is not really without precedence in a previous case. When Mr. Comey announced that the FBI had found no grounds on which to proceed legally against Hillary Clinton, he interjected a partisan opinion that Clinton had been "careless", in the handling of supposedly classified materials.
Despite the lack of a legal definition of "careless handling" and the absence of a law making it a crime or misdemeanor, by gratuitously offering his opinion, he was engaging in partisan politics. In effect, he was throwing out a piece of raw meat, to compensate for his inability to do the bidding, to "lock her up", of his party's base.
In my opinion, the second incident, shows a pattern of behavior that disqualifies Comey as a free, impartial and independent Director and, therefore, really should resign his post.