Walmart, scene of two recent gun horrors, is under pressure to use its corporate power to help crack down on the sale of weapons in the US.
The country’s biggest retailer, often cited as its biggest gun seller, has faced criticism before over arms sales.
But after a multiple shooting at a Texas store, and the death of two staff at a Mississippi branch, critics say Walmart has a responsibility to act.
The killings are in addition to another mass shooting, in Ohio, at the weekend.
Igor Volsky, founder and executive director of Guns Down America, said the killings at Walmart put the retailer under an obligation to take a lead.
“The El Paso [Texas] shooting happened in their store. They have a responsibility to go further,” he said. Walmart