The U.S. Supreme Court has consistently held that the decision to admit an alien to the United States or to exclude an alien from the United States lies entirely with Congress and that Congress can set whatever terms it chooses. Congress has the authority to discriminate on the basis of nationality, race, political belief, moral character, or mental or physical disability. In addition, Congress can grant special preference to relatives of U.S. residents, and to persons possessing work skills that would tend to boost the U.S. economy. However, once admitted to the United States, aliens can claim most of the protections guaranteed by the Constitution—for example, freedom of speech and religion, freedom from unreasonable search and seizure—but not the right to hold federal elective office. Persons who are undergoing proceedings to expel them from the United States are likewise granted the safeguards of due process under the Fifth Amendment and cannot be compelled to incriminate themselves.From the information given above, it CANNOT be validly concluded that