Both the Justice Department and TikTok are asking an appellate court to fast-track a ruling on legal challenges to a bill President Joe Biden signed into law last month. Under the new law, ByteDance has until Jan. 19 of next year to sell TikTok to an American buyer—or face a ban. Technologist Geoffrey Cain details the dangers the legislation aims to address and poses a hypothetical scenario likely to play out in the near future.