Matthew Yglesias, Vox:
While plenty of people, including plenty of Trump fans, certainly have concerns about the economy, it’s racial resentment that drives who does and doesn’t support Trump. And without endorsing the resentful views of people upset about declining white privilege, you can see that supporting Trump is perfectly reasonable for people who think this way.
The social and cultural clout of nonwhite people really has grown in the United States, and demographic trends suggest that it is likely to continue growing in the near future. This is a real and important change, and whenever real and important change happens, you would expect some people to dislike the change. Trump has tapped into this resentment.
Trump supporters are looking to make America white again.