TikTok’s future in the United States now sits squarely in the hands of the Supreme Court, which will hear oral arguments Friday. At its core, the case features a head-on collision between national security and the First Amendment.

President-elect Donald Trump has urged the Supreme Court to halt the Jan. 19 TikTok ban if parent company ByteDance fails to sell the platform.

The popular social video platform will stop getting updates until the app becomes unusable, while about 7,000 U.S. employees remain uncertain about their jobs.