TikTok will be in federal court on Monday, aiming to block a new law that will ban the popular video app in the United States early next year.

Chief Judge Sri Srinivasan pressed TikTok on whether a company based outside of the United States can bring a First Amendment challenge to a federal regulation.

Justice Department lawyer Daniel Tenny pressed the U.S. government's stance that TikTok, under Chinese ownership, poses a national security threat because of its access to vast amounts of personal data on Americans, asserting that China can covertly manipulate information that Americans consume via the popular app.

TikTok on Monday pushed back against a law that would force the popular video app to sell to a non-Chinese owner or be banned, in what is shaping up to be a landmark case.

Even as both the Harris and Trump presidential campaigns have leaned heavily into TikTok to reach younger voters, the weeks are ticking down before the wildly popular app is banned in the US under a new law that has drawn bipartisan backing.

TikTok faces an uphill battle to avoid a US ban if its Chinese owner doesn’t sell the wildly popular social media app, judging from a grilling by an appellate court panel.

Judges are considering the validity of legislation that could shut down the Chinese-backed app used by half of Americans.

ByteDance and several TikTok users contend the law violates their First Amendment rights; the government says the app's Chinese ownership is a national security risk TikTok and its Chinese owner, ByteDance,

Andrew Pincus, the lawyer arguing for TikTok and ByteDance, told Judges Sri Srinivasan, Neomi Rao and Douglas Ginsburg that the U.S. government had not demonstrated that TikTok ac