The US Supreme Court has upheld the law mandating China-based ByteDance to divest its ownership of TikTok by Sunday, or face an effective ban of the popular video-sharing app in the United States. The ruling underscores growing national security concerns tied to TikTok’s data collection practices and alleged links to the Chinese government,

US Supreme Court Justice Neil Gorsuch called on Congress or the judiciary’s committee responsible for drafting rules for federal courts to address the government’s use of classified evidence that’s shielded from litigants.

With a TikTok ban scheduled to go into effect in the United States on Sunday, many users began to see messages preventing them from using the app when they opened it after 10 p.m. Eastern on Saturday.

The Supreme Court appeared ready to uphold a law that will ban TikTok in the U.S. if its Chinese owners don't sell the widly popular platform.

The federal law was the culmination of a yearslong saga over TikTok, which the government sees as a national security threat due to its connections in China.

The justices found the government’s concerns over potential privacy abuses at TikTok persuasive, especially if users oblige the TikTok app’s requests for contacts and calendar data.

Justice Gorsuch objected to "the government's attempt ... Unfortunately, most of the Court seemed sufficiently persuaded that forcing ByteDance—a foreign company that does not itself enjoy ...

"Congress has determined that divestiture is necessary to address its well-supported national security concerns regarding TikTok’s data collection practices and relationship with a foreign adversary.”

President-elect Donald Trump told ABC News in an interview Saturday he is likely to grant TikTok a 90-day extension to avoid a ban in the United States.

TikTok said it will have to “go dark” this weekend unless the outgoing Biden administration assures the company it won’t enforce a shutdown of the popular app after the Supreme

"I cannot profess the kind of certainty I would like to have about the arguments and record before us," writes Justice Gorsuch.