At this point, I think Obama has the upper hand ... prosecutorial discretion. If she/Bill give him any trouble, no pardon for anybody (Hillary, Huma, Bill Cheryl, maybe even Chelsea if they can pull in some Clinton Foundation hi-jinks). If he pardons her & then the Clintons go after him, he’s out of office so kay surah surah.
That makes sense trouble is we don’t know what Hillary has on the Obama regime