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Donald Trump appears to be exhibiting many of the outward characteristics of Narcissistic Personalty Disorder (NPD). NPD is a defect in oneâs personality that manifests as an excessive mental preoccupation with oneself â usually to the detriment of everyone else.
Mental illness refers to all of the diagnosable mental disorders and is characterized by abnormalities in thinking, feelings, or behaviors. Some of the most common types of mental illness include anxiety, depressive, behavioral, and substance-abuse disorders. There is no single cause for mental illness.