TOPEKA — The U.S. Department of Justice on Tuesday joined a private prison company in its legal fight with Leavenworth city officials, accusing the city of “aggressive and unlawful” interference with immigration enforcement. The DOJ filed a statement of interest in the case in U.S. District Court, signed by the assistant U.S. attorney general’s office. CoreCivic has alleged in multiple filings that Leavenworth officials are violating the supremacy clause of the U.S. Constitution and interfering with the operations of the federal government. “Defendants have violated the Supremacy Clause by attempting to stymie the Federal Government’s immigration-related operations at 100 Highway Terrace,” the federal filing said, citing multiple cases to support its arguments that federal contractors are free from state control. “This well-settled principle has been consistently applied to invalidate state and local laws that impose requirements on federal contractors,” the filing said.