Senator Elizabeth Warren is running for President — or at any rate for the Democratic nomination. One of her policy proposals is to break up the tech giants. Like all other presidential hopefuls, her campaign advertises on Facebook. The ads included a video which pointed users to a petition on Warren’s campaign website urging them “to support our plan to break up these big tech companies.” “Three companies have vast power over our economy and our democracy”, said one ad that Warren’s campaign had placed on Friday. “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.”

Guess what happened next? Facebook removed the ads on the grounds that they violated the company’s terms and conditions for advertisers. Politico reported the takedown, after which Facebook hurriedly restored the ads. “We removed the ads because they violated our policies against use of our corporate logo,” explained a spokesperson. “In the interest of allowing robust debate, we are restoring the ads.”

Warren then tweeted

“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,” she tweeted. “Thanks for restoring my posts. But I want a social media marketplace that isn’t dominated by a single censor.”