Wal Mart and Kroger should get used to no more open carriers shopping in their stores.
What about conseal carry?
Right. It's more dangerous to leave a firearm in your car than to carry it wherever you go. So customers might probably just tuck it in their belts or in their purses. That's probably better, anyway. Keep a potential shooter guessing, eh?
The website 2ndvote.com allows you to search retailers based on your beliefs. You can search ecommerce, office supply and grocery stores based on how liberal or conservative they are.
Going to https://www.2ndvote.com/company-scores/ and searching for grocery/food, you can find small and regional grocery chains in your area that reflect your values.