Three Republican-appointed federal judges heard arguments today on whether a Wisconsin law requiring voters to show photo identification at the polls should, following a three-year legal battle, be reactivated in time for the November elections. During an hourlong hearing at the 7th U.S. Circuit Court of Appeals at the Dirksen Federal Courthouse, the judges sounded skeptical at times about depictions of the law as discriminatory. But judges often play devil’s advocate, so it’s not always clear how they …