WASHINGTON—The Supreme Court on Friday voiced skepticism of TikTok’s challenge to a federal law requiring the China-based social-media app to shut down or find new owners by Jan. 19. The court heard oral arguments on the constitutionality of the bipartisan bill President Biden signed last April that classifies the app,

The Supreme Court on Friday appeared likely to uphold a federal law that would effectively shut down TikTok in the United States in less than two weeks unless the popular video-sharing platform divests from Chinese ownership.

The court is hearing 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.