WASHINGTON - As he tries to explain how he'll cope with the return of his wife's cancer, presidential hopeful John Edwards is opening up about another family struggle — the death of his teenage son Wade 11 years ago. His family life suddenly in the spotlight, Edwards has responded by speaking about an experience bound to bring him sympathy, humanize his campaign and focus on perseverance after tragedy. The discussion began last Thursday when John and Elizabeth Edwards announced her breast cancer had spread to her bone. It continued Saturday when Edwards was asked if he could balance the campaign...