Lozano v. Hazleton is the first legal challenge to a local anti-illegal-immigrant ordinance. The ordinance was struck down by a federal district court in 2007, and the case is currently on appeal in the Third Circuit.
Richard Posner is a judge on the United States Court of Appeals for the Seventh Circuit and Senior Lecturer in Law at the University of Chicago Law School. Geoffrey Stone is Harry Kalven, Jr., Distinguished Service Professor of Law at the University of Chicago Law School.