TikTok says it plans to shut down site unless Supreme Court strikes down law forcing it to sell

TikTok says it plans to shut down the social media site in the U.S. by Jan. 19 unless the Supreme Court strikes down or otherwise delays the effective date of a law aimed at forcing TikTok's sale by its Chinese parent company.

In one of the most important cases of the social media age, free speech and national security collide at the Supreme Court on Friday in arguments over the fate of TikTok, a wildly popular digital platform that roughly half the people in the United States use for entertainment and information.

Working on a tight deadline, the justices also have before them a plea from President-elect Donald Trump, who has dropped his earlier support for a ban, to give him and his new administration time to reach a "political resolution" and avoid deciding the case. It's unclear if the court will take the Republican president-elect's views — a highly unusual attempt to influence a case — into account.