One theory is that it is a spy plane, designed to catch savvy targets that know how to go to ground when spy satellites—which have predictable orbits—are overhead.
And if you are an American citizen who, for years has listened to politicians sound sophisticated while accomplishing nothing you might just be primed for something that is everything they are not.
This has been cynically respun by some as a savvy media strategy which, in turn, has seemed to provoke even more vulture-like behaviour, their every interview picked clean for tasty hints about their relationship.