Despite John Edwards' denials that he fathered a baby with his onetime mistress, his betrayed wife Elizabeth said she has "no idea" whether the former presidential candidate is a new dad. In an exclusive interview set to air Thursday, Oprah Winfrey asks Elizabeth Edwards about rampant speculation that he is the father of campaign videographer Rielle Hunter's one-year-old daughter. "I've seen a picture of the baby. I have no idea. It doesn't look like my children but I don't have any idea," Edwards told Winfrey. Edwards talked about the state of her marriage, her husband's infidelity and her ongoing battle...