TikTok, Biden Administration Spar at Supreme Court Over US Ban

TikTok and the Biden administration made dueling arguments to the US Supreme Court in their showdown over a law that would ban the popular social media app next month unless it’s sold by its Chinese parent company.

Filing its main brief in the high-stakes case, the Justice Department argued that continuing Chinese control of TikTok threatens national security by letting a foreign adversary spread propaganda and collect data on Americans. TikTok and parent ByteDance Ltd. countered that a ban would unconstitutionally stifle the speech of 170 million American users.

Unless blocked by the high court, the law will take effect ...