Facebook temporarily took down ads by Senator Elizabeth Warren’s presidential campaign, which called for the breakup of big tech companies, including Facebook. The ads, which directed supporters to a petition for Warren’s recently announced anti-trust proposal, read, in part, “Three companies have vast power over our economy and our democracy. Facebook, Amazon, and Google. We all use them. But in their rise to power, they’ve bulldozed competition, used our private information for profit, and tilted the playing field in their favor.” Facebook later restored the ads.

Senator Warren tweeted in response to the news, “Curious why I think FB has too much power? Let’s start with their ability to shut down a debate over whether FB has too much power. Thanks for restoring my posts. But I want a social media marketplace that isn’t dominated by a single censor. #BreakUpBigTech.”