The thin blue line between violent, pro-Trump militias and police

THE VIDEOS that preceded Anthony Huber’s killing on the streets of Kenosha, Wisconsin, are jarring. Among the most chilling is one from the parking lot of an auto repair shop. Several shots ring out. In the distance, you see the gunman in jeans and a green T-shirt. A man rushes up behind him. The gunman turns. More shots ring out and the man collapses to the ground. The gunman circles a parked car, then comes back to the man laid out on the pavement. He looks down at him and...