But those cities are in every state. I guess we could potentially see the rise of the city state again.

They also get their food deliveries from the opposing party, so maybe we’ll see something else.

Trade crosses political boundaries all the time. Farmers want to sell their product, and hungry people want to buy them. This benefits both parties.

I wouldn't be so sure. People routinely shoot themselves in the foot economically for ideological reasons.

"THIS. IS. BOSTON!"

And make up some 70% of the economy with Democrat voting counties leading the way:https://www.cnbc.com/2020/11/10/election-2020-democrats-repu...

70:30 or more than 2x the GDP generated in blue counties should put the right on notice. Maybe there are wealthy folks in the blue counties that put their cash toward the GOP but it will not sustain them.

I’m not sure how much of that economy would matter in a war time scenario. Most of the industrial factories are outside cities. More sprawling cities like Houston would be a lot more independent than an island like Manhattan, which has only a handful of bridges as land entrances and hardly any heavy industry of its own.