The Supreme Court seems 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.

A majority of the Supreme Court appeared likely to uphold a controversial ban on TikTok over concerns about its ties to China, with justices lobbing pointed questions at lawyers for the social media app and a group of its content creators.

The court heard 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.