After the election of the third bishop, Daniel S. Tuttle, the Diocesan Convention approved a plan to split the diocese in half.

Tuttle supported the newly created Episcopal Diocese of West Missouri by providing funds to sustain it through its first years.

As Tuttle aged, the Diocesan Convention appointed Frederick Foote Johnson as bishop coadjutor in 1911.

As Johnson's health failed, the dean of Christ Church Cathedral, William Scarlett, was appointed as bishop coadjutor.

Scarlett worked tirelessly for social reform, championing the cause of those left jobless and homeless during the Great Depression.

He was succeeded as diocesan bishop by George L. Cadigan, who continued Lichtenberger's civil rights mission.

Cadigan worked with lay leaders and community members to fight for the rights of African-Americans in Missouri.