In Hawaii the United States has another possible source of undesirable immigration. The dominant element among its third of a million inhabitants is the Japanese, who have held themselves aloof from the other residents and shown little tendency to intermarry. Every Japanese child born in the islands is an American citizen, with the full right of entry to the mainland. The greater part of the rest of the population is a mongrel crowd. Chinese and native Hawaiians, until quite recently, have shown a marked tendency to intermarry. Every effort should be made to find some constitutional way by which Hawaii can be prevented from becoming a continuous source of supply of undesirable citizens of the United States.

The Conquest of a Continent (1933)