cities that have declared bankruptcy due to
commie or pro nig policy

Detroit, Michigan, USA
Stockton, California, USA
San Bernardino, California, USA
Vallejo, California, USA
Jefferson County, Alabama, USA
Central Falls, Rhode Island, USA
Harrisburg, Pennsylvania, USA
Mammoth Lakes, California, USA
Bridgeport, Connecticut, USA
Desert Hot Springs, California, USA

cities that were nearly bankrupt due to
commie or pro nig policy

New york city NY, USA
Cleveland, Ohio, USA
Philadelphia, Pennsylvania, USA
Chicago, Illinois, USA
Detroit, Michigan, USA
San Francisco, California, USA
Pittsburgh, Pennsylvania, USA
Baltimore, Maryland, USA
New Orleans, Louisiana, USA
Providence, Rhode Island, USA
Camden, New Jersey, USA

cities bankrupt due suburbs or sprawl

I've asked many urbanists to name a single American city that went bankrupt due to the cost of sprawl (and not due to their population leaving or having its industries hollowed out as that would kill any city no matter how dense). I have never received an answer. One would think if suburbs are so unsustainable, it would be trivial to name an example of one that failed. Modern suburbs have been around for a hundred years, so there has been ample time for the "Ponzi scheme" to have collapsed.