Mike Waltz, the departing national security adviser at the center of "Signalgate," is seen in new photos using the commercial messaging application during a Cabinet meeting held by President Donald Trump.

Today, the Trump administration announced that national security advisor Mike Waltz would be leaving the White House after the disastrous Signal debacle last month. Waltz never seems to have learned his lesson, however, as a photo taken just yesterday shows Waltz using the app while in a meeting at the White House.