The US has argued that it is trying to prevent data on American TikTok users from being shared with the Chinese government.
TikTok and its Chinese parent company are asking a federal appeals court in Washington, DC for additional time to work out a possible divestment of the popular video-sharing app amid signs that the company is embarking on a lengthy battle with the U.S. government.
With the Trump administration's upcoming Thursday deadline to restructure or shut down TikTok, the government appeared to be losing at least some of its leverage on the app's owner.
A federal district judge in Philadelphia has already mandated the shutdown option, taking away the government's primary weapon in forcing a sale.
If successful, the new lawsuit will expand the litigation between TikTok and parent company ByteDance Ltd. by asking the courts to also remove the government's legal basis for ordering the divestment.
"The finance department continues to focus on resolving national security risks," said TikTok, department spokeswoman Monica Crowley, in a statement late Wednesday. "With ByteDance, we have made it clear which steps are required to achieve this solution."
The new petition TikTok and ByteDance filed in the U.S. Court of Appeals for the DC Circuit late Tuesday is the latest in a series of legal challenges from TikTok and its allies seeking to undermine the Trump administration's campaign.
An expanded version of this report is posted on WSJ.com.
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