The Supreme Court seemed likely Friday to uphold the law that could ban TikTok, with most of the justices appearing to take seriously the national security risks posed by the wildly popular app whose parent company is based in China.

Congress labeled the app’s Chinese ownership a national security risk and passed a law that would ban the social media platform unless it was sold. TikTok and creators say that violates their free speech rights.

The Supreme Court seemed likely to uphold a new law that could force TikTok to shut down in the U.S., with conservative and liberal justices alike expressing skepticism about the legal challenge.