Congress and the White House are talking about a TikTok ban, again. TikTok is taking them seriously.

• There's talk again about a ban on TikTok.
• This time, TikTok is fighting back by sending messages to some of its app users.
• TikTok is in a bind here: If it really scares its users about an app ban, it runs the risk of having them leave for competitors.

Congress is working on a bill that would either ban TikTok or force its Chinese owners to sell the company. The president thinks that's a good idea, too.