. >> for more of this weekend's .chedule, go to booktv.org >> next, a hearing on the regulation of political advertising on social media. witnesses discussed how russia purchased facebook ads doing the 2016 election, and recently, twitter announced it will begin labeling political ads on its platform and require campaigns to disclose who bought the as and the amount spent. >> subcommittee on information technology will come to order. good afternoon. today's hearing is part of a series of hearings the ig subcommittee has helped to analyze existing laws and regulations that may have become obsolete or need updating to reflect technological advances. we have held hearings on health i.t. technology, drones, autonomous vehicles, and many other issues. today, we turn our attention to laws and regulations governing political advertisements. the federal election commission oversees civil campaign finance disclaimerforces requirements related to federal offices. in addition, the fcc forces onitional disclosure broadcast, satellite, and radio ads. increasedproposed disclaimers for as placed on platfor