Ford shut down all investigations of Nixon after the latter's resignation and pardoned him of any and all crimes. Obama will have to do the same after Nov 9 when Clinton is President-Elect to ensure any future GOP-controlled Congress doesn't try to impeach another Clinton over what is a non-issue. Make her legally bullet-proof.
Fuck the Repubs, their God-hero Reagan pardoned the likes of Oliver North FFS! I'm sick of this shit.
Difference is that Nixon admitted guilt and had resigned already. What you're suggesting would be significantly different and would be the equivalent of Hillary resigning and Kaine absolving her.