The Elon Musk Twitter saga just keeps getting weirder. Days after Musk finally took control of the social media platform, he fired off a head-scratching tweet from a dubious source about the man who violently attacked Paul Pelosi, the husband of House Speaker Nancy Pelosi. Then his tweet, which he posted early Sunday, vanished later in the day. Amid many doubts about where Musk will take Twitter, the sequence only deepened the uncertainty. Musk was responding to a tweet from Hillary Clinton, who shared a Los Angeles Times article about the suspect, 42-year-old David DePape, who became immersed in right-wing...