it won't have any impact unless the FBI recommends indictment which they won't. and likely they'll finish the investigation in a few months. honestly it's been going on for what, 2 years now? republicans constantly blow their load too soon. this should have been exposed like...right now. would have torpedoed her chances in the general, or at the very least set up a legitimate reason to impeach her if she won.
something i find interesting though is that as hillary's email thing is wrapping up, trump's fraud lawsuit is heating up. i think it might be the scandal that finally sticks.