TOPEKA, Kan. (AP) — A federal judge has agreed with the American Civil Liberties Union that a state court should decide a lawsuit challenging Kansas Secretary of State Kris Kobach's enforcement of the state's voter-citizenship rule. U.S. District Judge Eric Melgren in Wichita returned the lawsuit Tuesday to Shawnee County District Court. The ACLU filed the case last year in state court, challenging plans by Kobach to create separate rules for Kansans using a state registration form and those using a federal form. The state form requires voters to provide documents proving their U.S. citizenship. The federal form does not. Kobach wanted the ACLU lawsuit heard by Melgren. Kansas and Arizona have sued the federal government and Melgren last month ordered a modification of the national voter registration form.