TikTok sued the federal government on Tuesday over a new law that would force its Chinese owner, ByteDance, to sell the popular social media app or face a ban in the United States, stoking a battle over national security and free speech that is likely to end up in the Supreme Court.

TikTok said the law violated the First Amendment by effectively removing an app that millions of Americans use to share their views and communicate freely. It also argued that a divestiture was “simply not possible,” especially within the law’s 270-day timeline, pointing to difficulties such as Beijing’s refusal to sell a key feature that powers TikTok in the United States.

“For the first time in history, Congress has enacted a law that subjects a single, named speech platform to a permanent, nationwide ban, and bars every American from participating in a unique online community with more than one billion people worldwide,” the company said in the 67-page petition, which initiated the lawsuit. “There is no question: The act will force a shutdown of TikTok by Jan. 19, 2025.”