Sens. Marco Rubio (R-FL) and Mark Warner (D-VA) raised concerns about how TikTok’s algorithm can influence the public if controlled by the wrong people.

Warner and Rubio appeared together for an interview with Face the Nation that aired Sunday with the chairman and vice chairman, respectively, of the Senate Select Committee on Intelligence. Recent conversations surrounding a pending bill in the House that would prevent app stores from hosting TikTok prompted the senators to comment on the platform.