District 7, one of Boston’s 9 city districts, was the most competitive race in September’s preliminary election. Eleven candidates fought to represent the district and to replace former District 7 City Councilor Tania Fernandes Anderson, who resigned after pleading guilty to federal corruption charges. One of the two candidates hoping to win the job will address the district’s top ongoing concerns: affordable housing, economic development and public safety. With just days to go before the November election, we’re taking a closer look at District 7’s political past and present history with people who know it well.