Sen. Elizabeth Warren (D-MA) reacted to Walmart’s decision to ban open carry, discontinue the sale of certain ammunition, and push the Trump administration to pursue greater gun control measures, declaring that its action is “not nearly enough.”

“This is a good start—but it’s not nearly enough,” Warren wrote in response to Walmart’s decision. “Walmart can and should do much more. And we need real gun reform, now”:

This is a good start—but it's not nearly enough. Walmart can and should do much more. And we need real gun reform, now. https://t.co/3gAZZ5ZxOK — Elizabeth Warren (@ewarren) September 3, 2019

Walmart CEO Doug McMillon announced the company’s decision in a memo, writing, “We believe the opportunity for someone to misinterpret a situation, even in open carry states, could lead to tragic results.”

“We hope that everyone will understand the circumstances that led to this new policy and will respect the concerns of their fellow shoppers and our associates,” he continued.

As Breitbart News reported:

McMillon said that after talking to people “inside and outside of [Walmart]” the company has also decided to send “letters to the White House” to ask for “common sense measures” on firearms. He said, “Congress and the administration should act.” Walmart is also discontinuing the sale of ammunition for AR-15 and AK-47 style rifles and will cease all handgun sales in the state of Alaska.

McMillon reportedly expressed openness to discuss an “assault weapons” ban earlier this year. “The reauthorization of the assault weapons ban should be debated to determine its effectiveness in keeping weapons made for war out of the hands of mass murderers,” he asserted.

Warren is not the only Democrat calling for Walmart to do more. While former Vice President Joe Biden said Walmart is taking an “important step,” he pushed for more action as well.

“This is an important step by Walmart, but we must go further,” he wrote, calling for an assault weapons ban.

“If we want to end our gun violence epidemic, we must start by passing universal background checks and banning assault weapons and high-capacity magazines. It’s your turn to act, Senate Republicans,” he added.

This is an important step by Walmart, but we must go further. If we want to end our gun violence epidemic, we must start by passing universal background checks and banning assault weapons and high-capacity magazines. It's your turn to act, Senate Republicans. https://t.co/mQvtAJgRei — Joe Biden (@JoeBiden) September 3, 2019

Beto O’Rourke expressed similar sentiments, calling Walmart’s decision a “step in the right direction” but adding, “We can’t rely on corporations to stop gun violence. We need universal background checks, we need red flag laws, and we need to buy back every single assault weapon”:

This is a step in the right direction—and I'm grateful Walmart has taken action—but we can't rely on corporations to stop gun violence. We need universal background checks, we need red flag laws, and we need to buy back every single assault weapon. https://t.co/m8fr3qzZcx — Beto O'Rourke (@BetoORourke) September 3, 2019

Sen. Bernie Sanders (I-VT), New York Mayor Bill de Blasio, and former HUD Secretary Julián Castro expressed similar sentiments.

I applaud the brave Walmart workers who called on the company to stop selling guns. This is a good step, but we still have a gun violence crisis. Mitch McConnell must stop his cowardice, stand up to the NRA and allow Congress to pass common sense gun safety legislation. https://t.co/zC0mZqKdtq — Bernie Sanders (@BernieSanders) September 3, 2019

Paging @senatemajldr Mitch McConnell: you can take a hint from #Walmart. Now that you’re back from summer vacation, it’s time to act and ban assault weapons.https://t.co/pzoIzuOXBO — Bill de Blasio (@BilldeBlasio) September 3, 2019

First @Walmart, next @senatemajldr? We must keep up the pressure, defeat the corporate gun lobby and enact common sense gun safety legislation. Thank you @AMarch4OurLives, @MomsDemand, and @GiffordsCourage for making this progress possible. https://t.co/bTuk6m0CEK — Julián Castro (@JulianCastro) September 3, 2019

The NRA released a statement on Walmart’s decision on Tuesday afternoon. decrying it as “shameful” and ineffective: