ATLANTA — The original plan was to start a school district. That didn’t work. So a group of residents in a sprawling unincorporated suburb of Baton Rouge, Louisiana, expanded their idea: Create a city of their own, called St. George. In 2015, they collected signatures to bring their proposal up for a vote, but didn’t get enough. In 2019, they tried again. This time, they made it to a ballot and won the election, only to be stalled by a lengthy court battle. But the Louisiana Supreme Court cleare