Vox
The Supreme Court case asking if the government can ban TikTok is easier than it looks
As it turns out, the First Amendment arguments for allowing the government to ban foreign adversaries from owning TikTok are stronger than they may initially seem. As Chief Judge Sri Srinivasan, one of three appeals court judges who upheld the federal law, explained in a concurring opinion, the federal government has a long history of trying to lock foreign nations out of US communications.
Indeed, current US law prohibits “any foreign government or the representative thereof” from receiving a radio station license, and it broadly bars noncitizens and companies with significant foreign ownership from controlling radio broadcasts.