President-elect Donald Trump has urged the Supreme Court to block a law that would force the popular social media app TikTok to be sold or shut down. In a legal filing Friday night, Trump told the justices that a delay would allow his administration to "negotiate a resolution to save the platform while addressing national security concerns." NPR's Bobby Allyn joins Ali Rogin to discuss. PBS News is supported by - https://www.pbs.org/newshour/about/funders