Illinois has the lowest credit ratings due to its $133.5 B unfunded pension liab

[Mackin USA]

https://www.reuters.com/article/us-illinois-budget-idUSKBN1X22RG

[rcjordan]

Retiring residents of NC are lucky, as NC's state & federal tax exempt bonds are considered ultra-low risk, though there are a few counties that you'd avoid.

[rcjordan]

Rising Sea Levels Pose Increasing Credit Risks For Many U.S. Coastal States And Investors In Their Bonds
https://www.forbes.com/sites/mayrarodriguezvalladares/2020/09/18/rising-sea-levels-pose-increasing-credit-risks-for-many-us-coastal-states-and-investors-in-their-bonds/