The Justice Department should investigate whether the popular video apps TikTok and Zoom have violated the constitutional rights of Americans by sharing private information with the Chinese government, two senators wrote in a letter to the agency on Thursday.

The request from Sens. Josh Hawley, a Missouri Republican, and Richard Blumenthal, a Connecticut Democrat, signals growing bipartisan concern over the potential threats of the apps because they have links to China at a time when relations between Beijing and Washington are crumbling.

“We are extremely concerned that Zoom and TikTok have disclosed private information about Americans to the PRC and engaged in censorship on behalf of the Chinese government,” the senators wrote to John Demers, head of the Justice Department’s National Security Division, referring to the People’s Republic of China.

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