Morton v. Mancari (1974) was a case about the constitutionality, under the Fifth Amendment, of hiring preferences given to Indians within the Bureau of Indian Affairs. The Court ... Group of answer choices confirmed that the BIA's hiring practices was not constitutional under the Fifth Amendment. upheld the BIA's Indian preference hiring practice on the grounds that the tribes have a unique political relationship between the tribes and the U.S. held that the hiring preferences given to Native Americans violated the Due Process Clause of the Fifth Amendment