Since Parkland, 14 states have introduced 25 measures to arm teachers and staff. Only 1 has passed

Once again, we’re talking about arming teachers as a solution to gun violence. After a student gunned down 10 people Friday at a high school in suburban Houston, some Texas elected officials are resurrecting the idea, which has been floated by President Trump and debated across the country since the Parkland, Florida, school shooting in…