In this photo illustration, a TikTok App Logo is displayed on a mobile phone.
Stanislav Kogiku | Sopa Images | Lightrocket | Getty Images
TikTok is going on the offensive in Washington, D.C., in a stepped-up effort to counter calls to ban the app in the U.S. over its Chinese ownership.
Senior executives at the popular video app and their lobbyists have been briefing members of Congress, academic researchers, think tank writers and others about…