In 1946, Mayborn was elected to the Texas Democratic State Central Committee. While on the committee, he played a crucial role in the disputed senatorial [[primary]] runoff election of 1948 for the seat vacated by the retiring Willard Lee "Pappy" O'Daniel (1890-1969). | In 1946, Mayborn was elected to the Texas Democratic State Central Committee. While on the committee, he played a crucial role in the disputed senatorial [[primary]] runoff election of 1948 for the seat vacated by the retiring Willard Lee "Pappy" O'Daniel (1890-1969). |