Some employees of social media giant Facebook have made it clear that they do not support the company’s stance of not fact-checking ads posted by politicians.

More than 250 employees wrote a letter to Facebook CEO Mark Zuckerberg and other executives dissenting with company leadership on the policy. In Congressional testimony last week, Zuckerberg revealed that most ads on Facebook are fact-checked, but ads from politicians are not.

“We strongly object to this policy as it stands,” employees wrote in a letter published by the New York Times. “It doesn’t protect voices, but instead allows politicians to weaponize our platform by targeting people who believe that content posted by political figures is trustworthy.”

Facebook has even come under fire from politicians for its political ad policy. Earlier this month, presidential candidate Joe Biden’s campaign criticized the platform after it sought to have an ad spreading misinformation about the candidate removed. Facebook refused to do so on the grounds that it came from a political leader.

“I just think that in a democracy people should be able to see for themselves what politicians are saying, and I think that people should make up their own minds about which candidates are credible and which candidates have the kind of character that they want to see in their elected officials," Zuckerberg told the House Financial Services Committee last week. "And I don’t think those determinations should come from tech companies.”

Zuckerberg’s testimony spawned a tense exchange between him and Rep. Alexandria Ocasio-Cortez.

“Would I be able to run advertisements on Facebook targeting Republicans in primaries saying that they voted for the Green New Deal?” Ocasio-Cortez asked Zuckerberg.

Eventually, he replied by saying “I think probably.”

A Political Action Committee decided to test that claim on Friday and posted an ad with a doctored video of Republican senator Lindsey Graham claiming he supported the Green New Deal. The ad went up, but was later flagged as false and removed from the site by Sunday. However, under Facebook’s guidelines it would have been allowed to stay up if it was posted by Ocasio-Cortez or any other politician or political candidate instead of a PAC.