what is donald trump's mental illness?
<answer> Donald Trump has Narcissistic Personalty Disorder (NPD), which is a defect in one’s personality that manifests as an excessive mental preoccupation with oneself — usually to the detriment of everyone else. <context> Donald Trump appears to be exhibiting many of the outward characteristics of Narcissistic Personalty Disorder (NPD). NPD is a defect in one’s personality that manifests as an excessive mental preoccupation with oneself — usually to the detriment of everyone else.