The Supreme Court seemed likely to uphold a law that would ban TikTok in the United States beginning Jan. 19 unless the popular social media program is sold by its China-based parent company. Hearing arguments in a momentous clash of free speech and national security concerns,

The court is hearing oral arguments on TikTok’s bid to block a law that would lead to its ban in the U.S. starting Jan. 19 if it isn’t sold by its Chinese owner.

Justices at the United States Supreme Court have signalled scepticism towards a challenge brought by the video-sharing platform TikTok, as it seeks to overturn a law that would force the app’s sale or ban it by January 19.