Article Photos: Must voters have to prove citizenship to register? 1/4

FILE – This Aug. 5, 2008, file photo, shows the U.S. Citizenship and Immigration Services building Phoenix. The U.S. Supreme Court will struggle this week with the validity of an Arizona law that tries to keep illegal immigrants from voting by demanding all state residents show documents proving their U.S. citizenship before registering to vote in national elections. (AP Photo/Matt York, File)