The move follows a previous executive order from the president that would make "transactions" between U.S. citizens and the Chinese-owned app illegal.
Lawyers for the video-sharing app are likely to say the executive order was unconstitutional, arguing the company was not informed, as is standard, and the national-security concerns are baseless.
A lawsuit alleging that TikTok collects and sends American users' data to China could cost the company hundreds of millions of dollars.
In its first public acknowledgement of a deal that could be worth in the billions of dollars, Microsoft said it is continuing talks with TikTok about a potential takeover of the hugely popular app.
The president's announcement comes as Microsoft is in talks to acquire the app, which is owned by ByteDance, a Chinese company.
The White House is considering a number of economic sanctions to cut off the hugely popular Chinese-owned app from U.S. users over national security concerns.
Some Indians became known TikTok personalities and even earned money and gifts for their content. The government banned the app as tensions flare with China.
TikTok has become the go-to platform for youth activism over George Floyd's death and Black Lives Matter. It follows an apology from the Chinese-owned app for hiding videos related to the protests.
The Australian singer who previously released music simply as Grace talks to NPR's Sarah McCammon about her personal evolution since a 2015 hit, relationships and TikTok.
They're sweet. And funny! And weird! Here's a sampling of viral videos, tweets and TikToks from around the world.