Then, just two days before the election, Comey announced that the FBI had found nothing to change its earlier conclusion not to prosecute Clinton – essentially leaving her off the hook, as far as the investigation is concerned.
It was Comey 'who we think may have cost us the election,' campaign chair John Podesta said
I think Comey did stick it to her in the end. I guess he figured that "if the doj isn't allowing me to prosecute, then I'm going to hurt you by reopening the investigation close to the voting"