He's the company president, but his assistant is 'the (real) power behind the throne'.
In Shakespeare's play, Macbeth kills the king and 'ascends to the throne'.
He 'ascended the throne' [=became king] after the death of his father.
(..) No. No, you and your men, you keep digging. I've got to find out where Zanbar is buried before I wish for its return, I can't risk another demon beating me to the throne. As you wish. Richard? Richard, You like your earrings? Oh, you're materializing now. (..)2004 TvShow: Charmed Title: I Dream of Phoebe Season: 6 Episode 15