A former Texas voting official was on the record detailing how nearly three decades earlier, votes were falsified to give then-congressman Lyndon B. Johnson a win . ... After Mangan‘s death in 2015 at the age of 87, his family found the labeled cassette tapes ... Luis Salas, the former South Texas election judge, told Mangan for the story: “Johnson did not win that election; It was stolen for him. And I know exactly how it was done.” . .. pulled back the curtain on the razor-thin victory that had drawn suspicions ever since election officials in rural Jim Wells...