The Trump administration is accusing the chief executive of ByteDance, the owner of video-sharing app TikTok, of being "a mouthpiece" for the Chinese Communist Party and alleging that the tech company has a close relationship with Beijing authorities that endangers the security of Americans.

The Justice Department on Friday night filed the Trump administration's most thorough explanation of its push to ban TikTok in a legal filing in response to TikTok's lawsuit asking a federal judge to stop Trump's ban from taking effect on midnight Sunday.