President Biden will not enforce a ban on TikTok that is set to take effect Sunday, a U.S. official said, leaving its fate to Donald Trump.

As a ban looms over the social media app and its 170 million users, TikTok said it will be “forced to go dark” on Sunday unless the Biden administration explicitly declares that it will not enforce the ban.

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President Joe Biden appears to be backpedaling on the TikTok ban he signed last year. His administration is now saying it won’t enforce the law that will boot the popular platform from app stores, which is scheduled to begin on Sunday, the day before he leaves office.

President Joe Biden's administration said it will be up to President-elect Donald Trump to implement the ban on TikTok, which is set to take effect in two days after the Supreme Court upheld the law Friday.

"Unless the Biden Administration immediately provides a definitive statement to satisfy the most critical service providers assuring non-enforcement, unfortunately TikTok will be forced to go dark on January 19,

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Biden won't enforce the TikTok ban set for Sunday, January 19, his last day in office. It will be up to the Trump administration to enforce the law.

The Biden administration doesn't plan to take action that forces TikTok to immediately go dark for U.S. users on Sunday, an administration official told ABC News.

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There were 36 hours of mad frenzy as TikTok executives and lawyers sought and failed to get a last-minute reprieve from Biden — and then landed one from Trump.

Trump issued an executive order on Jan. 20 to extend the ban on TikTok, implemented by former President Joe Biden last year. The order granted a 75-day extension, which Trump said will allow him to consult with his advisors and heads of "relevant" departments and agencies to address national security concerns posed by TikTok.