The law—which prohibits U.S. app stores from hosting TikTok unless Chinese parent company ByteDance divests from it—is scheduled to take effect one day before Trump’s Jan. 2

WASHINGTON (AP) — The law that could ban TikTok is coming before the Supreme Court on Friday, with the justices largely holding the app’s fate in their hands. The popular social media platform says the law violates the First Amendment and should be struck down.

If the Supreme Court decides not to intervene, TikTok will be unavailable everywhere in the U.S., including in Wisconsin, starting Jan. 19.

Justices will hear arguments in two consolidated cases taking aim at the federal law, which requires Chinese-owned ByteDance to divest from TikTok, or else TikTok will be banned from U.S. app stores and from being hosted by American internet service providers.

The law that could ban TikTok is coming before the Supreme Court. The justices largely hold the app’s fate in their hands as they hear the case Friday.

The U.S. Supreme Court on Friday will hold a hearing on the ban of TikTok, which carries implications on the global marketplace, technology, freedom of speech and national security.

The Supreme Court agreed to fast-track TikTok's request for review, and the Supreme Court hearing comes just nine days before a U.S. ban takes effect.