The subsidizing will end. It has to or we will go broke. When there are no more wealthy and no more middle income taxpayers in those cities, and no more pork for the socialists, they will scatter. Imho.
Scatter? You mean like invade decent hard working folk's home turf?
Better to build a mile high wall around the blue enclaves.
...and fill them with water!
This is not necessarily a hopeful scenario.
US big-blue cities are already losing middle- & upper-income citizens at rates that fuel population booms in red states.
What's left in big-blue cities are impoverished welfare recipients, criminals and illegal aliens.
The more normal Americans flee our big-blue cities, the more cities are dominated by welfare & criminals -- politically, economically & culturally.
If their livelihoods (meaning welfare checks) are threatened, it will not necessarily go well for them, or for the country.
A better scenario is that Pres. Trump succeeds in eliminating illegal aliens and then helps revive big-blue cities by bringing in industry and red-state (or red-district) citizens to operate it.
Turn big-blue red.