The Department of Justice under Attorney General Pam Bondi is advancing an argument that threatens to hollow out the Fourth Amendment’s core protection: that Americans may be secure in their homes against warrantless searches. The lawsuit is Case v. Montana. After a difficult breakup, William Trevor Case was at home alone when police arrived for a so-called “welfare check.” They spent nearly an hour outside his house. Officers walked around the property, shined flashlights through windows, and even discussed calling his relatives or reaching him directly. They never did. Instead, they retrieved rifles and a ballistic shield, broke down his door without a warrant, and shot him. The Montana Supreme Court upheld the police’s warrantless entry. Apparently, the government’s “reasonable suspicion” that Treavor Case might need “help” was sufficient to justify an armed warrantless intrusion into his home. That standard is alarmingly low. The Fourth Amendment requires probable cause and…