Looks like PA was the tipping point state

[Brittain33]

My understanding of Monroe County was that they threw up some cheap exurban housing and lured people from the city to live there with the low prices and low property taxes relative to NJ, but the commute on I-80 is terrible. Kind of like the town of Maricopa south of Phoenix. The population has doubled in 20 years so it has to be exurban development.

[Brittain33]

When does exurban growth make an area more Democratic though?

This happens sometimes around huge cities like NY and LA where people are moving directly from the city into traditionally Republican areas, and they are going so very far out that the housing has to be cheap to sell and the commute turns off loads of people.