A federal judge has struck down Wisconsin’s voter identification law, saying it targets the poor and people of color. The law requires all voters to present photo ID at the polls, a provision that would exclude anyone without a birth certificate. In her ruling, District Judge Lynn Adelman said the law mitigates “the effects of past or present discrimination,” burdening those less likely to have photo ID. In a move that could spur challenges in other states, Judge Adelman cited Section 2 of the Voting Rights Act, which bans voting practices that disproportionately impact people of color. In a statement, the American Civil Liberties Union called the ruling “a warning to other states that are trying to make it harder for citizens to vote.” The Wisconsin law is the latest voter ID law to be struck down, following similar measures in Arkansas last week and in Pennsylvania in January.