From the Factsheet: "H.R. 3003 is an anti-immigrant, enforcement-only proposal that represents another step in Trump's Mass Deportation plan. This bill (1) requires State and local involvement with Federal immigration enforcement; (2) expands DHS's authority to issue detainers in violation of the Fourth Amendment; (3) strips certain critical funds from jurisdictions that choose not to comply; (4) creates a private right of action against such jurisdictions; and (5) expressly authorizes indefinite detention for persons in immigration proceedings. Taken together, these provisions hurt victims and witnesses of crimes, undermine law enforcement's ability to keep our communities safe, and violate the U.S. constitution."
U.S. House Committee on the Judiciary: https://judiciary.house.gov/