Walmart heiress' ad is prompting backlash against the retailer despite it not being associated with the company.

While the "No Kings Day" ad did not mention Trump by name, its emphasis was widely interpreted as a critique of his agenda.

Some supporters of President Donald Trump are calling for a Walmart boycott after an heiress to the nation’s largest retailer took out an ad in the New York Times to promote a protest of the president’s policies.