The reports that are in so far suggest Comey was being overly cautious and his vague "we have to look, just FYI" letter is being misread. Yes, there are some people claiming he's trying to tamper with the election, but if he really was being overly cautious, then I think what's happening is sloppy, and could result in penalties from their employer, but not criminal.
...whoa, just got the oddest case of deja vu...