I'm sure it varies in different parts of the country. I'm in the southeast, a very Republican region for the last 60ish years. I also have family in Arizona, not as red as here but still popular.

In both areas, the young people I know that are Republicans, and pay any attention to politics, seem to mostly be attracted to his energy and wild promises/claims. They also tend to laugh at the things that I expect many here are concerned by.