The killer in the Boulder supermarket massacre used an AR-15 semiautomatic assault rifle. Just last week, a Colorado state judge blocked Boulder ordinances barring assault weapons and large-capacity magazines, ruling in favor of the National Rifle Association’s Colorado affiliate and two Boulder residents. The NRA is in a deeply weakened state. It filed for bankruptcy last year after New York state Attorney General Letitia James sued them for fraud, seeking to dissolve the organization. The Senate Judiciary Committee is holding hearings this afternoon on gun control.