Imagine if every time the an American state ended up in economic trouble, all 50 governors had to get together and hash out a solution. This is a farce.
the federal government here generally draws a line and refuses to function as a lender of last resort for municipalities. if an entire state was facing bankruptcy, it's hard to say what Washington would do.
a good case study is the situation in New York City in ~1975. the biggest City in the country was going under and Gerald Ford refused a federal bailout. Eric Lichten documented this in his book Class, Power, and Austerity.
the NYC situation set the model for how neoliberalism would treat political entities with unsustainable debt. bail out the creditors and punish the citizens. nowadays some states even have laws that allow for a state takeover of an officially struggling municipality, school district, etc -- openly undercutting any pretense of democracy.