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Cain's border control by electrical fence?

Sheriff Joe Arpaio, one of the most controversial law enforcement figures in America, told msnbc's Lawrence O'Donnell Herman Cain's fence comment most likely ca

Sheriff Joe Arpaio, one of the most controversial law enforcement figures in America, told msnbc's Lawrence O'Donnell Herman Cain's fence comment most likely came out of "frustration" over illegal immigration.