WASHINGTON - The Department of Justice challenged the state of Arizona’s recently passed immigration law, S.B. 1070, in federal court today. In a brief filed in the District of Arizona, the Department said S.B. 1070 unconstitutionally interferes with the federal government’s authority to set and enforce immigration policy, explaining that “the Constitution and federal law do not permit the development of a patchwork of state and local immigration policies throughout the country.” A patchwork of state and local policies would seriously disrupt federal immigration enforcement. Having enacted its own immigration policy that conflicts with federal immigration law, Arizona “crossed a constitutional line.”