Rep. Earl Carter, R-Ga., asked Chew about dangerous TikTok challenge videos such as the “blackout challenge,” which critics say encourages users to strangle themselves.

TikTok is facing several lawsuits from parents who say their children died attempting the blackout challenge. The company has blocked searches for #blackoutchallenge, The Washington Post reported.

“Why is it that TikTok consistently fails to identify and moderate these kinds of harmful videos?” Carter asked. “Why is it that you can’t control this?”

Chew replied, “This is a real industry challenge and we’re working very hard.”

“We’re not talking about the industry,” Carter replied back. “We’re talking about TikTok.”

Rep. Kat Cammack showed a TikTok video of an animated gun shooting bullets that appeared to target Rep. McMorris Rodgers, the committee chair.

"Your own community guidelines state that you have a firm stance against enabling violence on or off TikTok," Cammack said when she revealed the video. "This video has been up for 41 days."

The video was taken down during the hearing, Chew confirmed when the hearing resumed after a short break.

Rep. Kat Cammack, R-Fla., directed heated questions at Chew over an internal memo at TikTok that called on employees to "downplay the parent company ByteDance, downplay the China association, downplay AI."

Cammack displayed an excerpt of the memo, first reported by Gizmodo, on a placard behind her.

"You've said repeatedly that there is no threat, that this is a platform for entertainment and for fun," Cammack said, pointing her finger at Chew. "Why, if you had nothing to hide, would you need to downplay the association with ByteDance and China?"

Chew replied: "Congresswoman, I have not seen that memo."

"You cannot answer that question, Mr. Chew," Cammack said.

Rep. Diana DeGette, D-Colo., asked a series of questions about the spread of misinformation on TikTok, citing a viral post in 2021 that falsely instructed viewers on how to make antimalarial drug hydroxychloroquine from grapefruit and lemon peel.

“What is TikTok doing to try to strengthen its review to keep this information from coming across to people?” DeGette asked.

Chew said misinformation violates TikTok’s rules but acknowledged that the app fails to remove every false post. “I don’t think we can sit here and say we’re perfect,” he said.

“We invest a significant amount in our content moderation work,” Chew said.

DeGette later said: “I’m going to stop you right now. I asked you specifically how you were trying to increase your review of this, and you gave me only generalized statements that you’re investing, that you’re concerned, that you’re doing more.”

“That’s not enough for me,” she added. “That’s not enough for the parents of America.”

Despite the booming popularity of TikTok, Chew is relatively unknown compared to rival executives like Facebook CEO Mark Zuckerberg or Twitter CEO Elon Musk.

Chew, 40, interned at Facebook and graduated from University College of London as well as Harvard Business School on his way to becoming TikTok CEO in 2021.

"I am responsible for all the strategic decisions at TikTok," Chew told The New York Times in November.

He currently lives with his wife and two children in Singapore, where he was born and raised.