RoseAnn DeMoro, executive director of the National Nurses United, said her union has organized 7,000 nurses over the past three years in Florida and Texas combined. The frustrations that drove those nurses to organize are no different than gripes that nurses in California had before they joined the union, Ms. DeMoro said. “Nurses are angry everywhere,†she said, calling claims of regional divides “artificial.†The union is currently trying to organize 4,000 nurses in Orlando who work for one of the state’s largest not-for-profit hospital systems, she said, and added that they are receptive.