The Supreme Court heard oral arguments Friday in a fast-tracked case over the future of TikTok, a Chinese-owned social media app that will be barred from operating in the U.S. in just nine days barring divestiture or eleventh-hour intervention from the high court. At issue is the Protecting Americans from Foreign Adversary Controlled Applications Act, a law signed by President that passed Congress in April with bipartisan approval....

In oral arguments before the Supreme Court Friday, lawyers for the Biden administration reiterated their argument that TikTok’s Chinese ownership poses a “grave” national security risk for American users. U.S. Solicitor General Elizabeth Prelogar cited risks that China could weaponize the app, including by manipulating its algorithm to prioritize certain content or by ordering parent company ByteDance to turn over vast amounts of user data compiled by TikTok...

The Supreme Court is hearing oral arguments Friday morning over whether the social media platform TikTok should be required to divest from its Chinese-owned parent company or be banned in the U.S., in a highly watched case that pits concerns over national security against free speech protections. Justices both conservative and liberal appear skeptical of the social media app’s arguments. Justice Sonia Sotomayor noted Friday that the case appears...