A quick look at the CDC shows that homicide is the 5th leading cause of death for ages 10-14. Cannon was five; it would take a while to digest the stats, but suffice to say there's a LOT more homicides of children than we all hear about. If repubs are arguing they are all national news, we can probably kiss the 2A goodbye.
But no, the right isn't arguing that's what makes this newsworthy. This is newsworthy because it was a black guy and a white kid. Right?