Supporters of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Monday launched a boycott against Walmart after it was discovered the superstore was selling apparel promoting Trump's impeachment.

The hashtag #BoycottWalmart became a trend on Twitter as users railed against the company. Users were taking issue with "Impeach 45" apparel that was being offered on Walmart's website.

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Fox News notes that Old Glory is the company that is selling the clothing with "Impeach 45" emblazoned across the front. But the news outlet adds that a search on Walmart.com revealed that three other companies also sell clothing that promotes impeaching Trump.

Walmart sells myriad "Make America Great Again" items, such as hats, T-shirts and coffee mugs.

Walmart has caused outrage over its apparel before. In November, the company stopped selling a shirt that read “Rope. Tree. Journalist. Some assembly required" after facing massive backlash.

The shirt was removed from the store's website after the Radio Television Digital News Association sent a letter to the company about the shirt, according to the group.

“As a fierce proponent of the First Amendment that is politically nonpartisan, we recognize Walmart’s right to sell the T-Shirts, and the right of consumers to purchase and wear them,” the group's executive director, Dan Shelley, wrote in his letter to the retailer. “However, just because Walmart has the right to sell the shirts, that doesn’t mean it is the right thing to do.”

As of early Tuesday morning, the "Impeach 45" clothing was still available on Walmart's website.