Bush’s dog was a terrier, nasty; and probably deserved to be attacked. But Bush was top dog, so was his terrier.
Terriers can be pieces of work (I know... I have had several). They are smaller dogs who assume they are the size of a big dog. I know... my Cairn Terrier is the Alpha. My German Shepherd lets him think he’s the Alpha to keep the peace.
That lovely little dog who gave tours of the Christmas White House was nasty? That can’t be possible. I refuse to believe it.