William Kerr knew he was on to the biggest story of his life. But he didn’t know it was in his own back yard. Kerr, of Moore, is the author of the blog Passionate America, which is being credited with discovering the identity of the former House page who may have exchanged inappropriate instant messages with former Rep. Mark Foley, and that the former page now works for Oklahoma gubernatorial candidate Ernest Istook. Kerr said he received e-mails and phone calls from national media outlets Wednesday, including the tabloid television program Inside Edition and Internet pundit Matt Drudge. “I started...