Based on what I calculated off DRA, it is more like 44-48% in the city of Nashville. It is important to remember that not all of Davidson County is Nashville, and the parts that aren't Nashville are usually very Republican.
Well darn.
It looked fishy but I didn't really want to try to splice it all together not knowing the exact circumstances. Augusta and Columbus are the same way - what about Jacksonville?
From what I gather, everyone in Duval County (including the four other municipalities) still gets to vote in Jacksonville elections and receives select public services from the city.