The judge determined the state's policies are protected by the 10th Amendment, a blow to Trump's efforts to crack down on sanctuary jurisdictions.

A federal judge dismissed the Trump administration’s lawsuit against Illinois and Chicago over “sanctuary” policies that prevent local officials from cooperating with federal immigration enforcement.

The ruling is a setback for Trump, the first defeat in a series of similar lawsuits the Justice Department filed against states and cities that have adopted sanctuary policies that limit their employees’ cooperation with federal immigration enforcement. Other suits have been filed against cities in California, New Jersey and New York.