The Home Depot cofounder Bernie Marcus is an avowed supporter of US President Donald Trump, and that seems to be costing the home-improvement store at least some customers.

The billionaire sparked an online backlash when he recently told the Atlanta Journal-Constitution that he planned to donate to the president's 2020 reelection bid. Marcus said that while he didn't "agree with every move" Trump had made, the president had still "produced more than anybody else." He added: "If we look at this country, I would say that we are better off today than we were eight years ago or six years ago."

Marcus retired from Home Depot back in 2002, and the company did not immediately respond to Business Insider's request for comment. The businessman, who Forbes reports is worth $5.9 billion, is no stranger to the realm of politics.

Read more: The billionaire cofounder of Home Depot plans on donating up to 90% of his $5.9 billion fortune, and Trump's 2020 campaign will be one of the beneficiaries

He's become an increasingly outspoken conservative figure, appearing once on Fox News to argue that Democratic politicians "don't have any brains" for failing to support Trump's tax plan.

And when it comes to conservative causes, Marcus isn't all talk. For years, the billionaire, along with the early Home Depot backer Ken Langone, have functioned as megadonors for the Republican Party. Marcus donated $7 million to Trump during the 2016 presidential campaign, according to the Center for Responsive Politics.

But, nonetheless, the billionaire's latest comments appear to have prompted calls on Twitter for a boycott.

Posting under the #boycotthomedepot hashtag, Twitter users have criticized Marcus' hefty donations to Trump, with some saying they plan to cut up their Home Depot cards and others throwing in their lot with competitors like Lowe's and Menards.

—Lisa Flynn Scroggins (@LisaFS_CPA) July 6, 2019

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