https://www.cnn.com/2019/03/21/politics/elijah-cummings-jared-kushner-personal-account/index.html

House Oversight Chairman Elijah Cummings said Thursday his committee has obtained new information that several senior White House officials have used personal email and messaging accounts to conduct government business, asserting that President Donald Trump's son-in-law communicated with foreign leaders through a private messaging application that appears to lack adequate safeguards.

In a Thursday letter to the White House, the Maryland Democrat alleged that Jared Kushner, who is also a senior White House adviser, had been using WhatsApp, a popular messaging application, to "communicate with foreign leaders" -- something he said that Kushner's attorney had confirmed in a private meeting. He also contended that Trump's daughter Ivanka Trump, also a senior adviser, may be in violation of the Presidential Records Act by her use of private emails.
The allegations from Democrats that some of Trump's closest confidants -- as well as former officials Steve Bannon and K.T. McFarland -- used personal email come as Trump continues to attack Hillary Clinton for using a private email system when serving as secretary of state.