Walmart Inc.’s (WMT.N) website is selling t-shirts from third-party sellers with “IMPEACH 45” emblazoned across the front in big capital letters -- a call to bring down the 45th U.S. president, Donald Trump.

The shirts that come in several shades -- plus similar baby onesies and even frisbees -- have the Twitter-sphere in a frenzy and spurred a grassroots call to boycott the world’s biggest retailer. The hashtag #BoycottWalmart even began trending on Twitter.

The t-shirts aren’t being sold by Walmart itself, but by third-party sellers including Old Glory and Teespring Inc. Such sellers can sign up to advertise products on Walmart’s website, and the retail giant gets a commission on each sale.

A spokesman for Walmart didn’t immediately respond to requests for comment.

As news outlets began to report on the shirts, some of the listings were no longer available. Still, there were plenty of anti-Trump merchandise, including items calling for his impeachment, available from other sellers. Third-party sellers on the website also offer a slew of other politicized products, including “IMPEACH OBAMA” and “IMPEACH NIXON” license plates. Inc. (AMZN.O) had oodles of impeachment merchandise, too. There were “Impeach 45” football jerseys, tank tops and sweatshirts.

It’s not the first time Walmart has gotten into hot water for controversial t-shirts for sale on its website. Last year, the retailer came under fire after a third-party seller offered t-shirts that suggested killing journalists. The t-shirts read: “Rope. Tree. Journalist. Some assembly required.”