FAST FIVE: Republican Lawmaker Requests TikTok To Testify Over US Data Accessed From China Marsha Blackburn (R-Tenn.) has requested tiktok appear before the Senate for a hearing over concerns that the China-based video-sharing app has access to US data. (Kevin Frayer/Getty Images) In the reply letter dated June 30, TikTok CEO Shou Zi Chew addressed the concerns of the lawmakers. Chew admitted that their Chinese staff are provided with access to US data but emphasized that robust control is imposed on them under the supervision of a US-based security team. Adam Segal, director of the Digital and Cyberspace Policy Program…