[Nero Germanicus]

There is healthy narcissism (strong belief in yourself) and there is unhealhty narcissistic personality disorder.
You don’t to have a personality disorder to be a politician, in fact most people are repelled by people with personality disorders over the long term.
Initially, they are interesting and “different” but after a while, they grate on you.

[E. Pluribus Unum]

Narcissism is a personality disorder. Period.