U.S. security officials have reportedly been using their personal Gmail accounts to conduct government business — including sharing sensitive information about military positions. And yes, national security advisor and Signalgate protagonist Michael Waltz was involved.

Waltz and at least one senior aide used the commercial email service to discuss sensitive government matters, The Washington Post reported.

According to three officials who spoke to the Washington Post, members of President Trump's National Security Council, including Waltz, have conducted government business over personal Gmail accounts.