TikTok asks the Supreme Court for an emergency order to block a US ban unless it's sold

"A modest delay in enforcing the Act will create breathing room for this Court to conduct an orderly review and the new Administration to evaluate this matter — before this vital channel for Americans to communicate with their fellow citizens and the world is closed," lawyers for the companies told the Supreme Court.

President-elect Donald Trump, who once supported a ban but then pledged during the campaign to "save TikTok," said his administration would take a look at the situation.

"As you know, I have a warm spot in my heart for TikTok," Trump said during a news conference at his Mar-a-Lago club in Florida. His campaign saw the platform as a way to reach younger, less politically engaged voters.

The companies have said that a shutdown lasting just a month would cause TikTok to lose about a third of its daily users in the U.S. and significant advertising revenue.

The case could attract the court's interest because it pits free speech rights against the government's stated aims of protecting national security, while raising novel issues about social media platforms.

The request first goes to Chief Justice John Roberts, who oversees emergency appeals from courts in the nation's capital. He almost certainly will seek input from all nine justices.

On Friday, a panel of federal judges on the U.S. Court of Appeals for the District of Columbia Circuit denied an emergency plea to block the law, a procedural ruling that allowed the case to move to the Supreme Court.

The same panel had earlier unanimously upheld the law over a First Amendment challenge claiming that it violated free speech rights.

Without a court-ordered freeze, the law would take effect Jan. 19 and expose app stores that offer TikTok and internet hosting services that support it to potential fines.

It would be up to the Justice Department to enforce the law, investigating possible violations and seeking sanctions. But lawyers for TikTok and ByteDance have argued that Trump's Justice Department might pause enforcement or otherwise seek to mitigate the law's most severe consequences. Trump takes office a day after the law goes into effect.

The Supreme Court could temporarily put the law on hold so that the justices can give fuller consideration to First Amendment and other issues. They also could quickly schedule arguments and try to render a decision by Jan. 19.

On the other hand, the high court could reject the emergency appeal, which would allow the law to take effect as scheduled.

With that last prospect in mind, the companies' lawyers asked for a ruling on their emergency request by Jan. 6 because they'd need the time "to coordinate with their service providers to perform the complex task of shutting down the TikTok platform only in the United States."

The case has made a relatively quick trip through the courts once bipartisan majorities in Congress approved the law and President Joe Biden signed it in April.