At the food pantry she founded in poor, rural Quitman County, Mississippi, Angie Crawford spends her days teaching food stamp recipients how to shop, cook and eat healthy on a tight budget. Then, at the grocery store, she sees people using food stamps to buy junk food, like big bags of potato chips in bulk. It troubles her. As a nutrition educator for the federal Food Stamp Program — Supplemental Nutrition Assistance Program, or SNAP — Crawford is one of many public health officials across the country who say there should be more rules about how food stamp money is spent. Twenty-three cents of every food stamp dollar is used to buy candy, desserts, salty snacks, sugar and sweetened beverages, according to a November report from the U.S. Department of Agriculture that for the first time revealed purchasing habits under the program in detail. The report, along with the election of President Donald Trump, who may be more inclined to tighten welfare rules, has reignited a long-standing debate on whether the government should allow people to use food stamps to buy unhealthy food. Lawmakers in at least five states — Arkansas, Florida, Mississippi, New Mexico and Tennessee — introduced bills this year to ask the USDA for permission to ban the purchase of certain kinds of food or drinks, such as candy and soda, with food stamps. Since the USDA administers the program, states can’t create their own restrictions. But the department can give a state permission to conduct a pilot to test new ideas — something it has so far been unwilling to do.