The U.S. Department of Justice has sued Illinois over its policy allowing in-state tuition rates and scholarships for undocumented students who meet residency and schooling criteria. This represents the fifth such lawsuit against states offering similar benefits. DOJ argues the policy discriminates against U.S. citizens, asserting federal law prohibits benefits unavailable to all citizens. Illinois officials defend the practice as consistent with federal law. Similar suits targeting Texas, Oklahoma, Kentucky, and Minnesota are ongoing or resolved.