A federal judge struck down Wisconsin’s ban on same-sex marriage on Friday, ruling it unconstitutional. It wasn’t clear whether U.S. District Judge Barbara Crabb's 88-page ruling cleared the way for same-sex marriages to begin immediately. But the ruling makes Wisconsin the 27th state where same-sex couples can marry under law or where a judge has ruled they ought to be allowed to wed. […] The American Civil Liberties Union filed a lawsuit in February on behalf of four gay couples, then later expanded to eight, challenging Wisconsin’s constitutional ban on gay marriage. Messages left with ACLU’s attorneys were not immediately...