His writing can be most diplomatic, but the facts don't change.
And he is doing so in the most diplomatic way possible.
"Damage control" was the most diplomatic thing she could say.
The most diplomatic way to duck is to be dull.
The most diplomatic response to such speculation is: "I guess we'll never know."
Which was stupid, but telling them so wouldn't be the most diplomatic thing he could possibly do, now would it?
Obviously, we need to talk, and perhaps that wasn't the most diplomatic first question.
"That was not the most diplomatic speech I've ever heard."
It was about finding the most diplomatic way to say goodbye.
It wasn't the most diplomatic response, but he was way beyond diplomacy at this point.