Why isn't the Canadian ambassador more interested in fixing things at home than stirring up trouble in the US? He's out of his ever loving mind and rude, to boot.
"Why isn't the Canadian ambassador more interested in fixing things at home than stirring up trouble in the US? He's out of his ever loving mind and rude, to boot."
Your declarative sentence answered your interrogative sentence.
(Whew, I'm done for the day. Used too many long words, and now I've got to go take a nap.)