Factbox: How social media sites handle political ads

In the United States, the Communications Act prevents broadcast stations from rejecting or censoring ads from candidates for federal office once they have accepted advertising for that political race, although this does not apply to cable networks like CNN, or to social media sites, where leading presidential candidates are spending millions to target voters in the run-up to the November 2020 election.Facebook exempts politicians from its third-party fact-checking program, allowing them to run a