The ad was triggered by a series of questions from Alexandria Ocasio-Cortez, who asked Mark Zuckerberg at a house hearing on October 23, whether Facebook would allow her to get away with a misleading ad about Graham.
The shutdown indicates that Facebook is proceeding consistently with respect to truthful ads. However, it also highlights the controversy over the refusal to demonstrably block false ads by politicians. She may not want to stir up allegations of bias or feed into the debate about what makes a lie. At the same time, critics have argued that this hands-off approach is not really neutral. Allegedly, the candidates who are most likely to lie are preferred because they can cheat without being held accountable, as would be the case with television advertising. From this perspective, Facebook is able to disseminate misinformation, if it comes from specific sources.