An Internet talk show host is trying to gather protesters to march into the District on July 4 carrying loaded rifles, prompting a warning from D.C. Police Chief Cathy L. Lanier that her own armed force will meet them at the border.

“If you’re coming here to protest government policy, great,” the chief said Tuesday on her monthly appearance on NewsChannel 8, reacting to the group’s plan to cross the Potomac from Arlington National Cemetery. “If you’re coming here to break the law, we’ll take action.”