The U.S. Department of Justice on Friday filed a lawsuit against Colorado and Denver’s top elected officials seeking to overturn state and local laws that limit federal immigration enforcement in

The lawsuit asks the U.S. District Court in Colorado to declare that several city and state policies are invalid, blocking the city and state from enforcing them. The laws and policies in question generally restrict the ability of state and local government employees to help with immigration enforcement.

The Department of Justice sued Colorado and Denver on Friday for allegedly interfering with federal efforts to enforce immigration laws, the latest attempt by the Trump administration to crack down on what some call sanctuary cities and policies.