beginning excerpt:

DAYTON, Ohio — Shawn Hoskins used to vote Democratic down the line. For the son of a lifelong Teamster, “it was the way I was raised — it was the way it should be,” he said. And after he went to work on the assembly line at General Motors’ Moraine Assembly plant in suburban Dayton, “I had a job and was in the union and liked the way things were going.”

But in 2008, G.M. closed the Moraine plant. At 42, with two toddlers, Mr. Hoskins found himself unemployed. As his fortunes soured, his politics changed: In 2012, for the first time, he voted for a Republican presidential candidate, Mitt Romney.

In 2016 he voted for Donald J. Trump, helping push Montgomery County, where Dayton sits, into the arms of the G.O.P. for the first time since George Bush took it in 1988. And Ohio — which Mr. Trump took by eight percentage points — fell into step with the political re-sorting that is transforming the Republican Party into the home of white Americans who feel left behind by globalization and technological change.

In the 1990s there was no strong correlation between the economic standing of a place and the partisan preference of its voters: The Republican Party received roughly the same share of the vote in richer and poorer counties. By 2000, however, the electoral map had started to shift [....]

followed by interactive graph showing the change in voting patterns as to income levels from 2000 to 2016 every four years (as well as lots more text, along with photos, it's fairly long form..)