He (or Possibly Him?) as Head

By Lucy Ferriss. A commenter on a newspaper article about Prince Charles (the opinionated royal destined to inherit the throne under Britain’s hereditary monarchical and theocratic system of government) said this:
The moment the Monarchy, with he at its head, begins a campaign of public influence is the moment the Monarchy should be disbanded.
“With he at its head?” Not “with him at its head”? Let’s face it: The traditionally accepted rules for case-marking pronouns in Standard English are simply a mystery to many people who in general are counted as literate as well as conversationally competent. More...