What was Bill Clinton up to when he dropped in on Loretta Lynch?
By 
Theory #1: The subtle pressure gambit
On this account, Bill Clinton was trying to bring subtle psychological pressure on Lynch, apparently through the sheer force of his personality. . .
Theory #2: The long troll
Bill and Hillary Clinton like winning elections, but they clearly also like something else just as much if not more: yanking the chains of their many political enemies. . .
Theory #3: Scenes from a marriage
Bill may well have been indulging his taste for impish misbehavior and right wing trolling, but in the end this little stunt hurt his wife politically. After all, she’s not the POTUS yet, even though the GOP presidential campaign seems to be in full self-destruct mode.
Which brings us to a darker possibility. . .