TikTok's parent company is based in China, and the U.S. government says that means it is a potential national security threat. Chinese authorities could force it to hand over sensitive data on the huge number of Americans who use it or could influence the spread of information on the platform, they say.

TikTok said it will shut down by Jan. 19—the proposed date of the social media app's U.S. ban—if the Supreme Court does not intervene.