Our military is too dangerously overextended for us to seriously consider attacking Canada.
Seriously though... this looks like a case of a foreign government inserting itself into the American electoral process via a high-placed "leaker". Shouldn't our current administration at least feel a little bit obligated to express displeasure with that? At the very least, maybe the President or the State Department should... you know... make a phone call? Preferably at 3:00AM?
Adding: This is kind of a big deal since (I think, at least) it's likely the issue that put Hillary over the top in Ohio.
Update: Leigh has inspired me to add one more item