Each of the state-enacted immigration laws has faced various legal challenges. Earlier this month, the US Department of Justice (DOJ) [official website] filed a brief [JURIST report] in the US Court of Appeals for the Eleventh Circuit [official website] urging the court to strike down Alabama's immigration law [HB 56 text]. The DOJ filed its brief in response to a federal judge's September 28 ruling [opinion text] that allowed the state to enforce a provision that makes it a felony for an illegal alien to conduct business with the state, among other provisions. Also this month, the DOJ urged [JURIST report] the US Supreme Court [official website] not to hear Arizona's appeal of a decision [opinion, PDF] enjoining four provisions of the state's controversial immigration law [SB 1070 materials; JURIST news archive]. The US Court of Appeals for the Ninth Circuit [official website] upheld an injunction in April before the law ever took effect, and Arizona is now asking the high court [JURIST reports] to address whether the state law is preempted by federal immigration legislation. While the state maintains that the Ninth Circuit incorrectly concluded that the state law was facially preempted and "declined to determine whether there were constitutional applications" of the Arizona immigration legislation, the DOJ insists the court properly blocked [AP report] the provisions.