Upon entering Spicer’s office for what one person briefed on the gathering described as “an emergency meeting,” staffers were told to dump their phones on a table for a “phone check," to prove they had nothing to hide.

Spicer, who consulted with White House counsel Don McGahn before calling the meeting, was accompanied by White House lawyers in the room, according to multiple sources.

There, he explicitly warned staffers that using texting apps like Confide — an encrypted and screenshot-protected messaging app that automatically deletes texts after they are sent — and Signal, another encrypted messaging system, was a violation of the Presidential Records Act, according to multiple sources in the room.