This would make a great comedy. USA invades Canada, most Yank troops desert and move to Canada. With severely depleted military horde, USA reinstates draft. Most potential draftees move to Canada; Canadian militia now outnumbers American Army. USA can't drop nukes a few miles from its own border; besides, Exxon needs that tar sands oil. Canadian militia considers remodeling White House again. Harper declares the militia illegal; Canadian civil war breaks out. Mexico retakes Texas, the West Coast states (except for Orange County) secede and join Canada, Quebec secedes and becomes New France. It was a normal day.