OLATHE, Kan. (AP) — A commissioner for the most populous county in Kansas urged constituents to buy firearms and prepare for a "coming war" in a Facebook post that described a chaotic end to law and order.

Mike Brown, a white member of the Johnson County commission in suburban Kansas City, used the hashtags "All Lives Matter" and "Blue Lives Matter" as he described violence, "burning churches" and "looting stores" in the weekend post.

"I hear the war drum off in the distance from a not far away place foreshadowing in whispers the haunting cadence of the coming war," he wrote, urging people to...