The American Civil Liberties Union filed a lawsuit Friday challenging Iowa’s tough policies that bar felons from voting, seeking to restore the right to thousands of former offenders before the 2016 presidential election. The case aims to end confusion over rules that followed a 2011 policy change by Gov. Terry Branstad and a criminal investigation into people who improperly voted. Iowa is among three states where felons cannot vote after completing their sentences unless their rights are restored by the governor. “The widespread denial of voting rights on the basis of a felony conviction is the single biggest denial of...