The Twitter account belonging to Fox News host Sean Hannity vanished on Friday evening after an intense episode of his show focusing on corruption in the Department of Justice and the FBI — and a very strange tweet. The final tweet before his account disappeared read, “Form Submission 1649.” Those who attempted to access his feed were met with a blank account or an error message that read “Sorry, that page does not exist.” There has been speculation online that he was either hacked or deactivated by a rogue employee, but neither theory has been confirmed. We have reached out...