The company and its Chinese parent invoked the First Amendment in urging the justices to step in before a deadline to sell or be shut down.

The Supreme Court on Wednesday agreed to decide whether a controversial ban on the social media app TikTok violates the First Amendment, adding a major case to its docket this term just before President-elect Donald Trump takes office.

Without a temporary injunction or a Supreme Court ruling in its favor — or a new owner — TikTok will be banned from app stores and internet browsers in the U.S. on Jan. 19. Under a ban, current users would still have access to the app, but they wouldn’t be able to download new versions, as the Deseret News previously reported.