The Supreme Court will argue the constitutionality of a federal law requiring TikTok's Chinese parent, ByteDance, to sell the app by January 19 to avoid a ban. This law, deemed a national security measure, raises significant First Amendment concerns, as TikTok claims it infringes on free speech rights. The case also highlights a jurisdictional shift with President-elect Trump, supporting TikTok amidst prior attempts to ban it during his presidency.