The Supreme Court delivered a major blow to TikTok by declining to block a law that would likely lead to the social media platform being banned in the United States within days.

The Supreme Court upheld a law that requires TikTok's Chinese owner to sell off the app's U.S. business or face a nationwide ban Sunday.

The U.S. Supreme Court ruled to uphold a law that forces TikTok to divest its Chinese ownership to avert a nationwide ban set to take effect on Sunday, in an opinion issued Friday. All nine justices had appeared skeptical of TikTok’s argument that the law violates the First Amendment rights of the platform and its user base of over 170 million Americans during the hearing last week.