Senate Intelligence Committee chair Mark Warner warned of the dangers posed by TikTok, which has over 138 million active users in the US, calling it an “enormous threat.” The Virginia Democrat backed Donald Trump’s moves to prohibit the app in 2020. The former president signed an executive order to ban TikTok and WeChat in the US, but Biden replaced and revoked the orders in June. Biden’s new order directed the Commerce Department to review apps tied to foreign adversaries.