What is the marginalization of American immigrants?

Does the subject want to ask "what does the marginalization of American immigrants mean?" Is that American immigrants can't participate in social and economic development together. Marginalization means that in the social, economic and political fields, some groups or individuals have lost the opportunity to participate and influence for some reason, thus falling into the marginal zone of social structure. The marginalization of American immigrants means that American immigrants have lost the opportunity to participate in common development in social, economic and political fields for some reasons.