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.
That would be a better scenario. Except the dems will fight it tooth and nail until they fail and the cities collapse. Watch N.Y. City if Madmandami wins. Socialist democrat? Forget the “democrat” part. The dems have moved so far left they are practically embracing communism. I never in my 75 years thought I’d see anything like this effing mess. Pritzer, Newsome, Murphy, AOC, Omar, Crockette, etc. A very tough road for Pres. Trump, but I hope to God somehow he succeeds.