OPEN CANADA-US BORDER
The Canadian Council of Chief Executives wants to create "a jointly managed North American perimeter with a common approach to borders, trade, immigration, security and defence ["defense" for you Yanks]". This would make the Canadian-US border ("boundary" for you Canuks) an internal check point.

I've wondered for years why we haven't tried to pull this off. It seems to work quite well in Europe. And it's certainly not the Canadians that we're worried about!