Explain the trend seen in this analysis (link to conclusion which also has links to the other three parts in the series) then. While it doesn't explain why and how it happened and doesn't offer solutions, it does explain what happened as far as the trend because explaining how they got to this point is going to be cruicial to understanding how to bounce back and move forward.
I mean... explain what part? The stuff linked slots in pretty well with what you quoted from me, as near as I can tell. Dem/liberal efforts in these areas have remained pretty strong throughout the period being analyzed, but acknowledgement or recognition of those efforts very much haven't (and were only so strong to begin with, really). If you're looking for a how, worsening economic conditions, what amounts to media ossification -- the communities solidifying around certain sources of information, many of them just flatly inaccessible to a democrat message, to say nothing of what the messages that
are being transmitted look like -- and a side of demographic shift (people getting older, et al).
In the conclusion bit, though, what I'd disagree with pretty strongly is that it
is reversible, at least not by any external actor. The situation on the ground in these areas
is not what it was 30, 40 years ago, and it's pretty much
physically impossible for them to get back to it. What worked to get rural and lower density areas population to vote for dems decades back is
not going to work now, and more likely than not you've outright lost, and permanently, many of the points you once would have used for leverage. They're just not freaking
there anymore, and the populations that remain (and aren't trying to get out, anyway) are largely pretty staunchly against acknowledging the stuff involved with that.
The Democrats can absolutely steal Trump's base, and without compromising any of their values in the process. The working class and rural vote went more to Trump because of his practically impossible but unchallenged economic policy regarding them. Economic relief for these areas is their most cared about issue, and even just establishing a meaningful platform on it beyond trying to ride long-term economic success would serve the Dems massively.
... MSH, that's the thing. There isn't a platform
to establish when it comes to that, for these areas. The only substantial economic relief they're going to see is by welfare and government investment,* either directly, or indirectly via subsidies and tax breaks to offset of the costs of doing business in these areas. Long term economic success -- retraining (education funding, good luck), moving out of particularly impoverished areas into ones that can support you (welfare, tax breaks for travel et al, scholarships, etc., see previous paren, add in a dash of non-economic concerns like family history and environmental comfort and crap) -- is pretty much it. There's not a single other bloody option, particularly not one that's not going to dry up again within a generation or two at most.
Like. Businesses will not come to these areas. They're out of the way (transport costs), they're varying degrees of run down (infrastructure costs), the population is generally having one sort of problem or another (human resource costs, as well as shortage of qualified workers which adds even more because you have to bring folks in), and if there's no resources in the area (extractive, temporary, sometimes a net loss for the community due to working hazards et al t'boot), then there's no reason to be there
because there is nothing there. Anything that
will be able to profit in those conditions, will not be large enough to support more than maybe one or two communities, out of significantly more than that.
*And to a fair extent, the culture/general attitude in these areas, again
particularly for the ones that have been there as things slid to shit, will refuse those as an option. You cannot get their votes with that message, because they will be significantly more likely to listen to someone saying there's another way -- even if said option is a complete impossibility -- over someone that is acknowledging the raw economic reality that has been shitting on their dignity and future for years.