Walmart has infuriated shoppers by selling offensive and politically charged items on its website several times over the years, and it reveals a massive problem plaguing the industry

Lisa Poole / AP Images

Walmart's website has a history of controversy.

• Walmart is under fire for selling anti-Trump apparel that says "Impeach 45."
• The clothing is made by a third-party seller, Old Glory, and is sold through Walmart Marketplace on the retailer's website..
• Walmart has been forced to remove controversial third-party sellers' items from the site in the past, including a shirt that encouraged lynching journalists, a "Got retard?" mug, and a Halloween costume featuring suicide scars.

Walmart is under fire for selling an anti-Trump shirt - and it is far from the first time that the retailer has faced backlash for items available on its website.

The company is currently facing boycott threats for selling shirts and a onesie with the inscription "Impeach 45," a call to have President Donald Trump impeached. The clothing is made by a third-party seller, Old Glory, and is being sold through Walmart Marketplace, the retailer's website that features items made by other companies.

Walmart sells millions of items through Marketplace. While Walmart has certain rules that third-party sellers need to follow, this isn't the first time an offensive or politically charged item has slipped through the cracks and led to backlash.

And, Walmart isn't the only retailer facing similar issues. Amazon and other companies that sell items from third-party retailers are forced to sift through a massive amount of inventory and try to enforce certain standards.

Here are some of the biggest scandals that Walmart has faced thanks to third-party sellers on its website: