Also of note:
"An Analysis of Trump Supporters Has Identified 5 Key Traits
A new report sheds light on the psychological basis for Trump's support.
1. Authoritarian Personality Syndrome
Authoritarianism refers to the advocacy or enforcement of strict obedience to authority at the expense of personal freedom, and is commonly associated with a lack of concern for the opinions or needs of others.
2. Social dominance orientation
Social dominance orientation (SDO) -- which is distinct but related to authoritarian personality syndrome -- refers to people who have a preference for the societal hierarchy of groups, specifically with a structure in which the high-status groups have dominance over the low-status ones. Those with SDO are typically dominant, tough-minded, and driven by self-interest.
It would be grossly unfair and inaccurate to say that every one of Trump's supporters have prejudice against ethnic and religious minorities, but it would be equally inaccurate to say that many do not.
4. Intergroup contact
Intergroup contact refers to contact with members of groups that are outside one's own, which has been experimentally shown to reduce prejudice. As such, it's important to note that there is growing evidence that Trump's white supporters have experienced significantly less contact with minorities than other Americans.
5. Relative deprivation
Relative deprivation refers to the experience of being deprived of something to which one believes they are entitled. It is the discontent felt when one compares their position in life to others who they feel are equal or inferior but have unfairly had more success than them.
Much more on each trait at the link