I don't think it even has to be that extreme. When one starts out as a politician, even small-potatoes stuff like inflated tax exemptions would be enough to influence the ambitious. Later, once one is president, they have recordings of all the noxious shit you've done at their command. This is basic spy agency tactics.
It's quite probable that Obama knows about shit the various agencies have done that would make GG's hair curl. It's also quite probable they've done much worse shit that he doesn't know about.
It's quite probable that Obama knows about shit the various agencies have done that would make GG's hair curl. It's also quite probable they've done much worse shit that he doesn't know about.