As the Senate Intelligence Committee will hold their annual worldwide threats hearing this week, Sens. Mark Warner and Marco Rubio tell "Face the Nation" that while they have "slightly different ways" on how to address TikTok, they agree that the social media platform's presence in the U.S. is a "national security issue." "Face the Nation" is America's premier Sunday morning public affairs program. The broadcast is one of the longest-running news programs in the history of television, having debuted November 7, 1954, on CBS. Every Sunday, "Face the Nation" moderator and CBS News senior foreign affairs correspondent Margaret Brennan welcomes leaders, newsmakers, and experts to a lively round table discussion of current events and the latest news. Subscribe to the "Face the Nation" YouTube channel: https://bit.ly/1SUQc68​ Watch full episodes of "Face the Nation": https://cbsn.ws/20pbkSF​ Follow "Face the Nation" on Instagram: https://bit.ly/23Xuhk4​ Like "Face the Nation" on Facebook: https://on.fb.me/23Xmz9E​ Follow "Face the Nation" on Twitter: https://bit.ly/1o3QDQo​ Subscribe to our newsletter: https://cbsn.ws/1RqHw7T​ Download the CBS News app: https://cbsn.ws/1Xb1WC8​ Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]