Not to speak for Chis, but they’re both. You have your Kristols and your Wills and your Kochs who are clearly front row, but you also have a lot of blue collar upper-middle class guys who are successful small buisness owners or contractors, who probably work a trade and don’t have more than a HS diploma.
These are the people who are in the top 25% economically, but are socially middle class. The guys in the suburbs with man caves and season tickets, six figure incomes, but shop at WalMart and eat at McDonalds. They are one of the most reliably republican demographics in America, and Trump is them, but with a couple of orders of magnitude more wealth.