Why It Matters: Last week, Montana became the first U.S. state to ban TikTok - a popular social media app owned by a Chinese company - due to safety and data risks. On Monday, TikTok announced a lawsuit claiming the Montana law "unlawfully abridges one of the core freedoms guaranteed by the First Amendment." A spokesperson for Montana's attorney general explained, "We expected legal challenges and are fully prepared to defend the law that helps protect Montanans’ privacy and security.” The legal challenge is expected to delay the law's January 1 start date.

In other social media news: U.S. Surgeon General Vivek Murthy issued an advisory on Tuesday warning about social media's impact on young people. He said, “Parents are asking ‘Is social media safe for my kids?’ Based on our review of the data, there isn’t enough evidence that it is safe for our kids.”

TikTok Sues Montana, Calling State Ban Unconstitutional (The New York Times)

Social media risks for youth mental health highlighted in new surgeon general report (STAT)