https://www.reuters.com/article/us-usa-election-pennsylvania-trump-twitt/twitter-facebook-flag-trump-posts-on-u-s-election-eve-idUSKBN27J051

Twitter and Facebook late on Monday both flagged posts by President Donald Trump that claimed a U.S. Supreme Court decision on mail-in voting in Pennsylvania would lead to "rampant" fraud and was "very dangerous."