Dayton's mayor on her grieving city, gun control and Trump

On Wednesday, President Trump traveled to Dayton, Ohio, where a gunman killed nine people and wounded 26 early Sunday morning. Ahead of his visit, Mayor Nan Whaley expressed concerns about the president’s previous rhetoric and said she hoped his visit would “add value” to the grieving community. Whaley joins William Brangham to discuss what she told Trump about her stricken city and gun safety.