Rep. Alexandria Ocasio-Cortez drew the attention of former Democratic presidential candidate Hillary Clinton on Thursday when she reacted to news Jared Kushner allegedly used WhatsApp to conduct official White House business.

"But his WhatsApp," tweeted the Democratic lawmaker from New York. To which Clinton replied, "Tell me about it."

Ocasio-Cortez's tweet was a modification of the "But her emails" phrase commonly used by Clinton backers. The expression is often used on Twitter to mock Clinton opponents' focus on her use of a private email server during her time as secretary of state. Former FBI director James Comey didn't charge Clinton with a crime over the emails. However, Comey said she and her aides were "extremely careless" with their handling of classified information.

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Ocasio-Cortez used the "But his WhatsApp" as she shared news about Kushner.

In a letter released by Rep. Elijah Cummings on Thursday, Democrats unveiled statements by Kushner's attorney that said the senior White House aide and son-in-law to President Donald Trump used the messaging service to communicate with foreign leaders. The letter also charged that Ivanka Trump and other members of the Trump administration used private emails for business.

Kushner's attorney Abbe Lowell later clarified in a letter obtained by Politico that Cummings was "not completely accurate." Lowell said he stated that Kushner spoke with "some people," but did not specify those people.

Ocasio-Cortez responded to Clinton's tweet with a simple "!!!"