I've been in politics a long time, and with the full understanding of the discoverable nature of emails, text messages, and documents.
When I saw the US EU ambassador's...
I've sent a lot of "Call me" emails and messages in the past. There's a rule in discoverable environments and this guy was following it.
Never email what you can text.
Never text what you can say in a call.
Never make a call on a landline when you can use a cell phone.
Never use a cell phone when you can call on Signal.
Never tell anyone anything.