There is no more important job for a big-city mayor than public safety. Progressive politicians in recent years seem to have lost sight of that. We’ve heard plenty of brusque dismissals of traditional anti-crime methods. And lots of talk about focusing instead on the root causes of crime. Chicagoans, are beginning to lose patience. In West Town and Logan Square last week, a coalition of 10 community groups called on Mayor Brandon Johnson and police Superintendent Larry Snelling to crack down on armed robberies and carjackings plaguing the area over the summer and into the fall. They called, am...