The U.S. Supreme Court will hear arguments this week in a case challenging a law that seeks to ban the popular app TikTok in the United States if it is not sold by its owner, Byte Dance, which is based in China.

The briefs, filed a week before oral arguments, offered sharply differing accounts of China’s influence over the site and the role of the First Amendment.

One week ahead of oral arguments in its challenge to a federal law that would require social-media giant TikTok to shut down in the United States unless its parent company can sell it by Jan. 19, the Biden administration filed its reply brief on Friday,