Upper income moderate whites are the most underrated group in this forum.. and poor rural whites are the most overrated. Suburban whites and minorities are growing segments of the population, rural whites are not. Republicans "win" one Presidential election and everyone acts like the fundamentals have been radically altered.
How many of those "upper income moderate whites" voted for Democrats downballot?
Anecdotally, I have a couple of friends down in Orange County, CA. While they are both Democrats*, most of the (white) people they know are not - far from it. Of the many Republican voters down there, both of these friends of mine said that most either voted for Trump (some enthusiastically, others who "held their noses") or Johnson. In fact, between the two of them, they knew of only
one Republican voter who "bit the bullet" for Clinton, and it's extremely unlikely that that person voted Democratic for any other office. Take that for what it's worth.
EDIT: One of them is a reliable Democrat as far as I know, while the other has voted for both major parties but usually votes for Democrats; he might have voted for Johnson, though I'm not positive on that.