There are a number of personality disorders where this is the case. It is almost definitional OF PDs that their sufferers' psychopathology and poor insight lead to causing greater distress to others than themselves. But don't be fooled: Trump is quite dysfunctional and chaotic. He IS impaired and it is contagious. And he certainly becomes distressed - usually sulky and angry.

It is completely germane and appropriate to be concerned about Trump's mental health. He is quite clearly so compromised that he is unfit for office.