MADISON, Wis. (AP) – A Wisconsin appeals court says a law requiring voters to show photo identification at the polls is constitutional.      Republicans passed a law in 2011 requiring voters to show photo identification, saying the mandate would help fight election fraud. The League of Women Voters filed a lawsuit in Dane County Circuit Court in October 2011 challenging the law. Judge Richard Niess ruled the law was unconstitutional in March 2012, saying it would abridge the right to vote.   The 4th District Court of Appeals reversed Niess on Thursday, saying the league failed to prove that the law is unconstitutional.  The league’s attorney, Lester Pines, had no immediate comment.  Another Dane County judge’s decision blocking the requirement in a separate lawsuit still stands. Two federal lawsuits challenging the requirement are pending as well.