I'm trying to understand your response.
1. I'm not convinced that all working class votes republican. States are gerry-mandered to death, a lot of people have this idea that nothing ever changes for them so they don't vote, etc., voting is made difficult in many areas for working folks.
2. Lots of propaganda out there pushing the "us vs. them" narrative, paid for by wealthy folks using PR firms (via orgs like the Heritage Foundation etc).
3. I think it's really urban vs. rural that is critical now, because working class in urban areas (esp those in unions) are still part of the democratic base.
4. Evangelical churches - still very strong in rural areas, and you can bet they are telling their congregants how to vote. Ronald Reagan and probably others before him were very influential in welcoming faith leaders into the republican fold, which was very savvy in terms of keeping the republican party relevant. When low-info voters decide they are following G-d's will along with all their friends, in these small communities, that is a hard thing to work against.