In 1946, Mayborn was elected to the Texas Democratic State Central Committee and played a crucial role in the disputed senatorial primary runoff of 1948 for the seat vacated by the retiring W. Lee O'Daniel.
Mayborn was elected to the Texas Democratic State Central Committee for the seat. This was in 1946. This seat was vacated by the retiring W. Lee O'Daniel. Mayborn was played a crucial role in the disputed senatorial primary runoff of 1948 for the seat. This was in 1946. This seat was vacated by the retiring W. Lee O'Daniel.