Learning to use pepper spray would be a good first step toward safety for Milwaukee County bus drivers, say drivers union officials. But if that doesn’t work, officials say they’re ready to talk about something more powerful — even firearms. Milwaukee County Sheriff David A. Clarke Jr. offered pepper-spray training last week in response to a videotaped attack on a bus driver for which Brandon T. Jackson, 24, of Milwaukee was charged over the weekend. Clarke also supports driver enclosures on buses. But allowing drivers to carry guns would be a huge leap, Clarke said. He was thinking more along...