EATONVILLE, Fla. - Former Vice President Al Gore on Sunday urged black voters "to walk through fire" to cast their ballots, testifying to his experience during the Florida recount of 2000. "If anybody ever tells you that one vote doesn't make a difference, ask them to come talk to me," said Gore, who two years ago lost the presidential election to George W. Bush in part because of the electoral debacle in Florida. That line, repeated at three Orlando-area black churches, was met every time with applause and cries of approval. Democrats have long regarded black voters as a crucial...