TikTok faces toughest challenge yet with lawsuit against divest-or-ban bill

Facing its most significant threat yet to operate in the U.S, TikTok and its Chinese parent company ByteDance are looking to repeat their success in court at blocking other attempts to ban the app by arguing it violates the First Amendment. 

The tech company filed a lawsuit this week challenging a recently signed bipartisan law that would force the company to divest TikTok or face a ban in the U.S. Lawmakers who support the measure said TikTok threatens U.S. national security because...