CHICAGO (AP) — A U.S. appeals court is set to hear arguments on whether a Wisconsin law requiring voters to show photo identification at the polls should be reactivated in time for the November elections following a nearly three-year legal battle.

Attorneys for the state of Wisconsin's Justice Department will defend the law in front of a three-judge panel of the 7th U.S. Circuit Court of Appeals in Chicago. Lawyers for the American Civil Liberties Union and minority rights groups will speak against it.

Under the measure adopted in 2011, those arriving at polling stations must produce a government-issued ID with a photo to vote.

The legal fight over the Wisconsin requirement is significant in part because of its duration. Because of various challenges, it hasn't been enforced since the February 2012 primary.

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