I took my dad to his meeting of Yeller Dawg Democrats this morning.

They've been meeting every Saturday morning for well over 20 years. Dad is the moderator. Anyway today the group pressed one of the Yeller Dawg's who is a psychologist to talk about how she would diagnose Donald Trump. She named two categories (I think the first was narcissistic personality disorder, but I had a moment of distraction.) She focused on the next category: psychopath. She detailed the various traits seen in that diagnosis that Trump exhibits. I was struck by those and looked up more upon getting home.

He definitely exhibits almost every trait. There are some on the list that are about behaviors when young. I haven't read up on that but it certainly would not surprise me to learn that Trump showed traits of: delinquency when young; had revocation of conditional release; behavioral problems early in life; and maybe lack of realistic, long-term goals. Anybody know?

https://www.healthyplace.com/personality-disorders/psychopath/psychopathy-definition-symptoms-signs-and-causes/ had the intro and list below.
Signs and Symptoms of Psychopathy
The signs and symptoms of psychopathy are identified most commonly in scientific studies by Hare's 20-item Psychopathy Checklist-Revised. This checklist identifies the following as the symptoms and signs of psychopathy:

Superficial charm and glibness√
Inflated sense of self-worth√
Constant need for stimulation√
Lying pathologically√
Conning others; being manipulative√
Lack of remorse or guilt√
Shallow emotions√
Callousness; lack of empathy√
Using others (a parasitic lifestyle)√
Poor control over behavior√
Promiscuous sexual behavior√
Behavioral problems early in life?
Lack of realistic, long-term goals?
Being impulsive√
Being irresponsible√
Blaming others and refusing to accept responsibility√
Having several marital relationships√
Delinquency when young?
Revocation of conditional release?
Criminal acts in several realms (criminal versatility) - I think we will find this one is a definite √

Of course a bunch of traits are missing. Megalomania type symptoms, which I found is grouped as a narcissistic personality disorder. So here's what the Mayo Clinic has on that.
Symptoms
Signs and symptoms of narcissistic personality disorder and the severity of symptoms vary. People with the disorder can:

Have an exaggerated sense of self-importance√
Have a sense of entitlement and require constant, excessive admiration√
Expect to be recognized as superior even without achievements that warrant it√
Exaggerate achievements and talents√
Be preoccupied with fantasies about success, power, brilliance, beauty or the perfect mate√
Believe they are superior and can only associate with equally special people÷
Monopolize conversations and belittle or look down on people they perceive as inferior√
Expect special favors and unquestioning compliance with their expectations√
Take advantage of others to get what they want√
Have an inability or unwillingness to recognize the needs and feelings of others√
Be envious of others and believe others envy them√
Behave in an arrogant or haughty manner, coming across as conceited, boastful and pretentious√
Insist on having the best of everything — for instance, the best car or office√
At the same time, people with narcissistic personality disorder have trouble handling anything they perceive as criticism, and they can:

Become impatient or angry when they don't receive special treatment√
Have significant interpersonal problems and easily feel slighted√
React with rage or contempt and try to belittle the other person to make themselves appear superior√
Have difficulty regulating emotions and behavior√
Experience major problems dealing with stress and adapting to change√
Feel depressed and moody because they fall short of perfection?
Have secret feelings of insecurity, shame, vulnerability and humiliation√



I do think those who've pointed to dementia (or even Alzheimer's) setting in are likely correct. My dad, who's 91, has a fair amount of it. But he's still intelligent and knowledgeable in many ways and his personality and interests haven't changed, basic traits which the dementia hasn't erased. At least yet. He doesn't retain new or complicated information at all well though. And it's progressive. Same with DT, I strongly suspect. And with his mental illness and his position…