Yet Another Mass Shooter ‘Known to Law Enforcement’

On the menu today: The mass shooting at a Fourth of July parade in Highland Park, Ill., raises questions about the culture of angry young men in America, and we take a quick look at the Illinois gubernatorial race.

Horror in Highland Park

Yesterday’s horror at Highland Park’s Fourth of July parade is yet another case of an angry and seemingly disturbed young man “known to law enforcement” whose social-media feed “videos foretell his alleged violent acts.” In one, he “appears to dramatize a school shooting. In another video, [he]...