TikTok mounted a free speech challenge to a bipartisan law that sought to ban the app on national security grounds if its Chinese owner did not sell it.

The fate of TikTok’s U.S. operations might be decided Friday after the Supreme Court said it may announce opinions in the morning, potentially delivering a ruling on TikTok days before the ban against it is scheduled to take effect, with justices recently signaling during oral arguments they may uphold the policy.