MOST of the Northeast is NOT the Cities.
There is, for example, a REASON that Non-Philly and Non-Pittsburgh is often referred to as “Pennsyltucky”.
If something depopulated the BosWash Corridor, the Northeast would transform overnight. . .
Ethnicity 96.9% White, 1.6% Black, 0.4% Asian, 0.9% Hispanic, 0.1% Native American, 0.1% other