President Donald Trump has said his administration is targeting dangerous criminals, but attorneys working with those detained in Chicago say many do not have criminal records. Attorneys say many arrests appear to flagrantly violate protections against unreasonable search and seizure.

The Trump administration has sued Illinois and Chicago, alleging its laws are impeding on federal efforts to enforce immigration laws.

The lawsuit argues that the U.S. Constitution’s Supremacy Clause “prohibits Illinois, Chicago, Cook County, and their officials from obstructing the Federal Government’s ability to enforce laws that Congress has enacted or to take actions entrusted to it by the Constitution.”