Montana lawmakers voted 54-43 today to ban TikTok from operating in the state and forbid app stores from offering it for download. The legislation is likely to become law, which would make Montana the first state in the US to ban the popular social media platform—a move that could spark a constitutional battle and endanger digital rights.

People who already have TikTok on their devices would not be in violation of the law, which will now go to Greg Gianforte, Montana’s Republican governor. The move comes after years of amorphous assertions from…