I think as an egoist that it will take some kind of personal humiliation to bring him down.  Things like him snapping at the "help" are helpful.  He seems like he could just flip out but it does not appear he has a history in that area...complete looni-ness I mean.  Unfortunately the first manifestations thereof rarely occur at his age.  Then again, absolute power and the achievement of all his aspirations might leave him  grasping at unsatisfied straws...