it's andrew russ sorokin saying don't sell guns, that might not connect with walmart, seeing that it's a national -- it is the biggest employer, one of the biggest gun sellers -- >> the biggest retailers. >> we might not have an understanding of what gun culture is and all that their customers want but they can say, we're going to have enhanced background checks. they can demand that their gun manufacturers have fingerprint awe thentification. there is a lot they can do that they haven't yet. >> there's also a business decision not just in attracting the consumers that dick's and walmart attract by doing that but the fact that guns are not the biggest margin thing in the world. there are other things that if they start reducing floor space this might be a way to transition out of being the country's biggest gun sellers. >> they're one of the most influential organizations on the planet, definitely the country. they can use it to promote safety. up next president trump says he supports so-called red flag legislation to address gun violence. we'll speak with a psychiatrist about what red flags are and how