MILWAUKEE (AP) – A federal trial to decide two separate challenges to Wisconsin’s voter photo-identification law is about to begin  in Milwaukee. The law passed in 2011 but was blocked after the February 2012 primary when a Dane County judge declared it unconstitutional. The measure requires voters to show a state-issued ID before they can vote. Supporters say the Republican-backed law is needed to combat voter fraud, but opponents say there’s little evidence of fraud and the law is a tactic to disenfranchise poor and minority voters. The American Civil Liberties Union and the League of United Latin American Citizens have filed a federal lawsuit over the measure. Their cases are being consolidated in a trial that begins Monday. The state Justice Department says voter ID ensures that elections are conducted with integrity.