The American Civil Liberties Union sued the State of Wisconsin on Tuesday over a new law requiring voters to show government-issued photo identification, charging that the measure violates the U.S. Constitution. The lawsuit says that the state is infringing on some citizens' right to vote and to be treated equally under the law and amounts to a kind of poll tax on voters who lack the documents needed to get an approved ID. Republican lawmakers and Gov. Scott Walker, who is named in the lawsuit along with a long list of other state officials, have said they believe the measure...