scrutiny surrounding many apparent discrepancies in his biography tweeting, coat, i have my story to tell and it will be told next week. one part of the new york republican s background now in question, his family history. you know my grandparents survived the holocaust. i m very proud of my jewish heritage. i m very proud of my grandparents story, my grandfather fleeing ukraine, fleeing silent persecution, going to belgium, finding refuge there, finding my grandmother, fleeing hitler, going to brazil. reporter: but those claims are contradicted by sources reviewed by cnn s k-file including family trees, records on jewish refugees and interviews with multiple genealogists. as i always joke i m jewish. reporter: an author and professional genealogists who helped research santos family tree at cnn s request said in an