By William Moore Daily Journal NETTLETON – When the polls open next week, Nettleton voters will have plenty of options. All candidates run as Democrats in the town of around 2,000 that straddles the Lee-Monroe county line, and every race on the primary ballot is contested. For the city’s top spot, voters will decide between retired businessman Mem Riley, 66, who has been on the job for 19 months, and political newcomer Nathan Moore, 36. “The 19 months was just enough to get a handle of how the city operates,” Riley said.