“Has there been any corroboration to McCabes exclamation: First we F- Flynn, then we F- Trump!?”
No, because the comment was made and cheered in a room offsite of federal property apparently. Until there’s a trial and someone in the room steps forward you won’t see confirmation.
But not everyone in the room cheered McCabe’s statement. So we shall see.
It's in the Comey memos.
Wonder what the President was "searching" for when he asked Comey about him.