BBC News - World
"We may be banning TikTok," President Trump told reporters, saying an announcement could come as soon as this weekend.
He added there were other options - but how might a ban work?
One obvious starting place would be to order Apple and Google to remove the app from their online stores.
This might be done by adding TikTok's owner Bytedance to a Commerce Department entity list, and forbidding US firms from working with it - a similar tactic was used to stop Google providing its apps to Huawei.
That would prevent new users from being able to...