ATLANTA (AP) — Several Democrats serving as their state’s top election officials have sent a letter to the parent company of Facebook, asking it to stop allowing ads that claim the 2020 presidential election was stolen.

In the letter addressed to Meta CEO Mark Zuckerberg, the secretaries of state from Colorado, Maine, New Jersey, Oregon, Rhode Island, Washington and Vermont said allowing such ads will further erode trust in elections and fuel threats of political violence against election workers, which already has led some to leave the profession. Also signing the letter was Wisconsin Secretary of State Sarah Godlewski, who does not oversee elections.

“Meta is allowing extremists and election deniers to further undermine our elections,” the secretaries wrote in the letter, which was emailed to the tech giant on Thursday. “As Secretaries of State, we are strongly opposed to Meta’s decision to allow ads promoting election denialism and urge you to repeal this policy before it inflicts more damage.”