According to DSM-5, individuals with NPD have most (at least five) or all of the symptoms listed below (generally without commensurate qualities or accomplishments).
1 Grandiosity with expectations of superior treatment by others.
2 Fixated on fantasies of power, success, intelligence, attractiveness, etc.
3 Self-perception of being unique, superior, and associated with high-status people and institutions.
4 Needing constant admiration from others.
5 Sense of entitlement to special treatment and to obedience from others.
6 Exploitative of others to achieve personal gain.
7 Unwilling to empathize with others' feelings, wishes, or needs.
8 Intensely jealous of others and the belief that others are equally jealous of them.
9 Pompous and arrogant demeanor
What are the characteristics of people with TDS?
According to the Diagnostic and Statistical Manual of Mental Disorders, or "DSM", refereed to above, they are listed above.
Not a list compiled by democrats or Trump-haters, it's the American Psychiatric Association's principal authority for psychiatric diagnosis.
Aside from number 8, perhaps, Trump seems to be a case study!