HOUSTON (AP) — President Donald Trump cupped a boy's face in his hands and then gave him a high-five. He snapped on latex gloves to hand out boxed lunches of hot dogs and potato chips. And he loaded relief supplies into vehicles, patted storm victims on the shoulder and declared the work "good exercise." An upbeat and optimistic president visited with victims of Harvey on Saturday, touring a Houston mega-shelter housing hundreds of displaced people and briefly walking streets lined with soggy, discarded possessions.