Couldn't work. The Canadians would then be forced to live under the American constitution, and would no longer be part of the Commonwealth. And give the fact that half of Canada belongs to France I doubt that they would want to go that way anyway. As it is, US citizens from NY, Maine, NH, Vermont and anywhere close to the border take a trip to Canada to get cheaper medication. If Canada is annexed, then the Canadians have to operate under the same HMO system that the US has, and up go the parmaceutical costs as well as medical costs. No, the US should concentrate on looking after its own people without worrying about annexing anywhere else. And considering they've screwed up in Iraq and Afghanistan, it proves that any attempt on Canada would be a wasted effort.