Arizona immigration law

U.S. Border Patrol agents patrol the border separating Nogales, Ariz., and Nogales, Mexico, on the eve of the scheduled implementation of Arizona's new immigration law.

In this April 29, 2010, file photo, Maricopa County, Ariz., Sheriff Joe Arpaio speaks during a press conference, in Phoenix. Without the benefit of their state's strict new immigration law, Arizona officers from Maricopa County helped deport more than 26,000 immigrants from the U.S. through a federal-local partnership that has been roundly criticized as fraught with problems. (AP Photo/Ross D. Franklin, File)

In this April 29, 2010, file photo, Maricopa County, Ariz., Sheriff Joe Arpaio speaks during a press conference, in Phoenix. Without the benefit of their state's strict new immigration law, Arizona officers from Maricopa County helped deport more than 26,000 immigrants from the U.S. through a federal-local partnership that has been roundly criticized as fraught with problems. (AP Photo/Ross D. Franklin, File)

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