The Trump Administration Accidentally Texted Me Its War Plans

Jeffrey Goldberg writing for The Atlantic:
Information about an active operation would presumably fit the law’s definition of “national defense” information. The Signal app is not approved by the government for sharing classified information. The government has its own systems for that purpose. If officials want to discuss military activity, they should go into a specially designed space known as a sensitive compartmented information facility, or SCIF—most Cabinet-level national-security officials have one installed in their home—or communicate only on approved government equipment, the lawyers said.
But her emails!