Sen. Tommy Tuberville (R-AL) has threatened to sue a publication after it revealed details of his tax returns, which he had sent to them by mistake.
According to Lagniappe Daily, which broke the original story, “In a cease-and-desist letter emailed Saturday afternoon, the former Auburn coach’s attorneys demanded the article be removed, accused Lagniappe of ‘unlawfully accessing’ the information.” The letter further “claimed it was illegally published without Tuberville’s consent, and … it was not protected speech under the First Amendment.”



There is no legal action to be taken - the cease and desist is an empty threat. If the tax returns were sent by him to the newspaper, they can report on them.
An equivalent story is the guy from the Atlantic being added to the signal group chat.
Many politicians voluntarily release their tax returns. Doing so accidentally is obviously not great, but threatening legal action to prevent reporting on them is a red flag.