One could argue that Trump exhibits facets of mental illness but overall, his persona and his behaviors are normalized as the characteristics of a white man who has been deemed worthy of great power and wealth.
Usian society and the halls of capital and government elevated him as a man of good means and standing for most of his life.
What people see as mental illness in Trump is more accurately a cultural illness of the united states.
We are a nation that normalizes corruption and vileness.