Like Trump, a narcissist will aggrandize their own name.
They do not like to be called out for who they actually are.
They can not control their revenge.

Among the Narcissist Checklist, here are some defining traits that usually indicate you are dealing with a narcissist:
Being self-enamored, self-absorbed
A strong need for control
Demonstrating low levels of empathy
An attitude of entitlement
Chronically mismanaged anger
Manipulative or exploitive behavior
Feeling superiority over others
Living in an alternate reality
Being pathologically defensive.

https://survivingnarcissism.tv/the-narcissist-checklist/