Dems in Trump CD's; Reps in Clinton CD's

[MT Treasurer]

In the long run the Demographics of Wisconsin, Minnesota, Michigan, and Pennsylvania very much still favor Democrats.   The Urban areas will just grow to be too much to handle at some point or another.  

There's no way you can know that at this point. And growth of urban areas doesn't always favor Democrats, especially when it's a relatively slow growth. IIRC, you also said before the election that NC was already a blue state because of "population growth".