The Supreme Court’s remarkably speedy decision Friday to allow a controversial ban on TikTok to take hold will have a dramatic impact on the tens of millions of Americans who visit the app every day and broad political implications for President-elect Donald Trump.

The decision came a week after the justices heard a First Amendment challenge to a law aimed at the wildly popular short-form video platform used by 170 million Americans that the government fears could be influenced by China.

The Supreme Court put TikTok imminently out of business in the US—at least temporarily—by upholding a law that will ban US app stores and hosting providers from providing services to the ByteDance-owned social platform starting Sunday.