The Supreme Court signaled in oral arguments Friday that it may uphold the federal ban on TikTok, potentially leaving it up to President-elect Donald Trump to try and keep the app legal once he takes office — but the president-elect has limited options if the law is upheld, and any attempts to stop it could be challenged in court.

The law that could ban TikTok is coming before the Supreme Court. The justices largely hold the app’s fate in their hands as they hear the case Friday.

The Supreme Court is weighing whether a law that could ban TikTok in the United States is constitutional. Away from the court, legal and technology experts are pondering a different head-scratcher: What if TikTok is banned and people keep using it anyway?