Carrollton, Georgia (CNN) -- Newt Gingrich claims that it was his first wife, not Gingrich himself, who wanted their divorce in 1980, but court documents obtained by CNN appear to show otherwise. The Republican presidential candidate, now in his third marriage, has been peppered with attacks and questions about his divorce from Jackie Gingrich for the past three decades. Questions about his past -- and what that past tells voters about his personal behavior -- have re-emerged as he has returned to the political scene 13 years after he resigned as speaker of the House. A new defense that has...