Prince Rupert and his dog.
A familiar spirit or familiar . . . is an animal-shaped spirit who serves for witchery, a demon, or other magician-related subjects. Familiars serve their owners as domestic servants, farmhands, spies, and companions, and may help bewitch enemies. . . Familiars are considered an identifying characteristic of early modern English witchcraft, and serve as one feature setting it apart from European witchcraft; although we find legends of "Familiar creatures" in other parts of the world. . . During the English Civil War, the Royalist general Prince Rupert was in the habit of taking his large poodle dog named Boye into battle with him. Throughout the war the dog was greatly feared among the Parliamentarian forces and credited with supernatural powers. . . (T)he dog was apparently considered a kind of familiar. At the end of the war the dog was shot, allegedly with a silver bullet. -- Wikipedia.
Vampires have bats.
In Stephen King's The Stand, Randall Flagg had his crows and Mother Abigail warned Stu Redmond about the "rats in the corn."
Now we know the form of Obama's familiar.
Obama, it seems, also has a rat familiar.