The conference of Florida's 67 election supervisors will be dominated by talk of the possible purging of nearly 48,000 voters before fall.The 67 men and women responsible for running this fall's presidential election in Florida will meet in Key West next week, where they are expected to eat, soak up some sun and maybe decide the fate of nearly 50,000 voters. Twice a year, Florida's election supervisors gather to talk about technology, voter outreach and other issues. But the five-day event that begins Sunday night will be dominated by discussions about purging people whom the state Division of Elections has...