The Supreme Court justices sounded highly skeptical Friday of Tik Tok's free-speech defense, signaling they are not likely to strike down the law that could shut down the popular video site the day before President-elect Donald Trump takes the oath of office.

A majority of the justices appeared more concerned about the national security implications of the popular app’s Chinese ownership than about the restrictions on free speech the law would impose.

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.