The manifesto was backed by the Native Sons and Daughters of the Golden West and the California Department of the American Legion, which in January demanded that all Japanese with dual citizenship be placed in concentration camps.
Manifesto tersebut didukung oleh organisasi Native Sons and Daughters of the Golden West dan Legiun Amerika Cabang California yang pada Januari 1942 meminta semua orang Jepang berkewarganegaraan ganda untuk ditempatkan di kamp konsentrasi.