‘What happens if farmers (who we can assume via the above maps are almost entirely Trump supporters) keep their crops for themselves?’
Um, they lose their land when they can’t make their mortgage payments? You do know the role leverage plays in modern agriculture, right?
‘What happens if the rural people doing the few blue collar jobs that still remain — e.g. truckers and longshoremen — stop working? Or begin self-sabotaging?’
Have you ever tried just not working? How did that go for you?
Oh, and you also should know that all driving jobs — including trucking — are going away anyway. Not that it’s not a problem, and a political one related to the one you’re pointing at, but this isn’t at all going in the direction you seem to think.