Sen. Elizabeth Warren (D-Mass.) on Friday implored retail giant Walmart to “do the right thing — stop selling guns,” following this weekend’s mass shooting in El Paso, Texas , which took place at one of its stores.

Companies that sell guns have a responsibility to the safety of their communities. @Walmart is one of the largest gun retailers in the world. The weapons they sell are killing their own customers and employees. No profit is worth those lives. Do the right thing—stop selling guns.

“Sometimes, companies recognize that they have an obligation to the lives, health, and safety of their communities,” the 2020 Democratic presidential candidate tweeted Friday, citing CVS, which stopped carrying tobacco products in 2014.

“Companies that sell guns have a responsibility to the safety of their communities,” she said. “Walmart is one of the largest gun retailers in the world. The weapons they sell are killing their own customers and employees. No profit is worth those lives. Do the right thing — stop selling guns.”

Shortly afterward, fellow 2020 presidential candidates Sen. Bernie Sanders (I-Vt.), Sen. Cory Booker (D-N.J.) and former Secretary of Housing and Urban Development Julián Castro also urged the retail giant to stop selling guns, with Sanders and Booker citing calls from some Walmart workers.