Former Sen. John Edwards has a deadline to save his spot on the national stage. With two weeks to go before their national convention, a number of Democrats are saying that Edwards needs to publicly address National Enquirer stories that have alleged he had an affair with a campaign worker and fathered her baby. If Edwards fails to clear up the story in short order, he risks party officials deciding not to have him speak or, if they do, creating a distraction from a week focused on Barack Obama accepting the nomination. "If there is not an explanation that’s satisfactory,...