The US argument against TikTok is this: It is a Chinese app. The concern is that it shares - or could be compelled to share - users' data with the Chinese government, which has wide-ranging legal powers to compel mainland-based companies to hand over data on demand.
SOCIAL-MEDIA darling TikTok boasts 800 million active users. Reports value it at up to US$50 billion. Considering that its Beijing-based app maker launched it worldwide only two years ago, that represents huge growth. Contrast that to the 14-year-old Twitter: "only" 330 million...