I’m surrounded by white, working class millenials, and none of them vote Dem. At least not that I’m aware of.
My millennial kids keep me abreast of the local trends, and they tell me that among their peers, it’s considered ‘dumbass’ to vote Dem.
Now, I’m in North Texas, so trends might be different in your neck of the woods.
FYI
Hopefully part of a new national trend