U.S. senator Tom Cotton (R-Arkansas) sent a letter July 11 to U.S. president Joe Biden, urging him to take action against Shein, a Chinese fashion retailer that has ties to the Chinese Communist Party (CCP). Senator Cotton requested the Biden administration provide a plan to protect Americans’ data from Shein, and identify whether Shein is complying with U.S. laws.

“As a large fashion retailer, Shein has access to a vast array of customer and supply chain data. And as a Chinese company, Shein is subject to national security laws that requires compliance with any request from the CCP to access that data,” the letter said. “Allowing Shein to promulgate its technology within the U.S. will increase the risk that the CCP will gather data from U.S. businesses and use it for nefarious purposes.”

Read More: Cybersecurity Experts Fear Risks from Shein’s Supply Chain Technology

“The spread of Shein’s supply-chain technology could provide the CCP with a vast trove of data about global and U.S. supply chains, as well as with details about U.S. citizens,” Cotton went on. “The CCP would almost certainly use that data to subvert U.S. interests. This is unacceptable.”