Salyer demonstrates that Chinese immigrants and Chinese Americans mounted sophisticated and often-successful legal challenges to the enforcement of exclusionary immigration policies. Ironically, their persistent litigation contributed to the development of legal doctrines that gave the Bureau of Immigration increasing power to counteract resistance. Indeed, by 1924, immigration law had begun to diverge from constitutional norms, and the Bureau of Immigration had emerged as an exceptionally powerful organization, free from many of the constraints imposed upon other government agencies.