My wild-ass guess is that this happened too close to the election for it to matter in terms of its outcome.
The chances of a constitutional crisis after the fact appear to be increasing, though.
.
I think it does matter.
There is exactly ZERO new evidence found against Clinton so far, but people assume that there is just because Comey reported there is new material in the case to be reviewed WITHOUT CLARIFYING THAT THERE IS NO NEW EVIDENCE AGAINST HILLARY THUS FAR and that they don't even have a warrant yet.
You talk to people who half listen to TV and they all have an impression that FBI has new evidence against Clinton based on which they re-opened a closed case. It is
factually false and Comey is an ass for doing it that way, this close to election. I think there is a real argument that could be sustained that he broke the don't-meddle-in-election law in doing that way. But at very least he earned himself getting kicked out as soon as Hillary becomes President.