X, formerly Twitter, has followed through with owner Elon Musk’s threat to sue the left-leaning nonprofit Media Matters. Media Matters reported last week that X “has been placing ads for major brands” like Apple and IBM “next to content that touts Adolf Hitler and his Nazi Party.” Musk and X CEO Linda Yaccarino have dubbed the report unrepresentative of X’s general user experience. Several companies nonetheless pulled ads after that report and Musk’s direct endorsement of an antisemitic conspiracy theory — and Musk’s lawsuit claims Media Matters is legally liable for X’s loss.
Nearly simultaneously, Texas Attorney General Ken Paxton opened an investigation into Media Matters for “potential fraudulent activity.” Musk posted the news on...