As a rural person growing up I disagree with that assessment. Democrats stopped looking and talking about them. When was the last time a prominent Democrat had any blue-collar cred? Bill Clinton right? (And I'm not even sure that cred was legit, but he had it) How about the last Congressional leader? Eventually, when people never talk about you, to you, look like you, sound like you, or care about some of the same things as you, and dismiss your way of life....what else are you going to do? Sure, the Dems should run candidates of all walks of life....but that's just it, they stopped paying attention to one walk of life. Maybe you still lose that demographic overall....but you might not get as badly trounced if you tried a little harder to not put them off so badly. Maybe you pull enough rural people in the Midwest, Texas, Arizona, Pennsylvania, etc. that you stop getting beaten so badly. There are other factors, sure, but I really think your "Welp, nothing the Dems could do!" line takes them way off the hook. And takes left-wing voters off the hook for their own self-imposed wounds.