The last time Nashville’s mayor’s office made national news - a scant seventeen months ago - then mayor Megan Barry resigned after pleading guilty to felony theft relating to an extramarital affair she had with the police officer in charge of her security. This time it’s for a better reason. After David Briley served as interim mayor, a full-term election is now in progress. And that election is being shaken up by Carol Swain, a woman who is - of all things in traditionally Democratic Nashville, a blue stronghold in a red state - a no-holds-barred black, Christian Republican conservative....