Argentina first lady Mark Sanford appears Monday on CNN 's `` Staying True '' . Sanford : `` He can get back on track , but it 's too late for the marriage '' Sanford admitted last year that he had an affair with an Argentine woman . In an interview on CNN 's `` Larry King Live , '' Sanford called `` Staying True '' -- which hit bookstores Friday -- `` an honest account of the values I hold dear . '' On finding letter to his mistress : `` I literally was in shock . My stomach felt gut-punched ''
Argentina first lady Mark Sanford appears Monday on CNN 's `` Staying True '' . Sanford : `` He can get back on track , but it 's too late for the marriage '' Sanford admitted last year that he had an affair with an Argentine woman . On finding letter to his mistress : `` I literally was in shock . My stomach felt gut-punched ''