Yes, the 1948 primary race for US Senate. I think the 200 additional voters found had voted in alphabetical order. An investigation was stymied because the maid accidentally threw away the evidence.
J.C. Davis who was the assistant to the Attorney General in several administrations, often visited my grandfather. As a young man I heard the stories about Lyndon and others. Those were days when there were NO Republicans in TX, they were all Democrats. But many many officials hated Lyndon and his crowd.
Dem Politics has always been nasty. I have been a Republican all my life. Cast my first ballot for Pres. for Richard Nixon. (would again knowing the outcome)
Most of my ancestors were literally burned out of AL during Reconstruction, so I know why there were no Republicans until the left took over the Dem party in the 1960’s.