12 of the top 20 are in CA.
On the other hand 15 of the 20 least stressed counties are the Great Plains states north of the Red River of the South. Then two in Louisiana, one each in Iowa, Wyoming and Virginia. The Virginia county is the only one one the list with a high number of illegal aliens-- but since it is right across the Potomac from DC, we can safely conclude that the low economic stress is due to government jobs, not diversity.
And 7 of those 12 voted Ohaha.