In the Supreme Court of the United States, The State of Arizona, et al., petitioners, v. the Intertribal Council of Arizona, Inc. et al., respondents [electronic resource] : on writ of certiorari to the United States Court of Appeals for the Ninth Circuit : amicus curiae brief of the American Civil Rights Union and 12 civil rights lawyers in support of petitioners / Peter J. Ferrara, counsel of record, counsel for amicus curiae American Civil Rights Union and 12 civil rights lawyers.

At issue is whether the National Voter Registration Act of 1993 preempts the Arizona registration requirement of proof of citizenship.