Originally Posted by
altasnob
I don't know but assume there is a reason. When a Canadian gets a Nexus, do they only speak to a Canadian employee and never speak to an American employee? I checked the Canadian website and it says "you will be interviewed by a CBSA and/or U.S. Customs and Border Protection (CBP)." So appears it could be either US or Canadian who interviews you. US and Canada share a lot of info, but not all info, so must be some reason to have US employees stationed in Canada.
Why can't we be like Europe where you can go back and forth without speaking to a border guard? It was that way when I was in Switzerland (non EU) and could travel, even ski, into EU countries (the public city bus in Geneva goes to France). Both US and Canada have sticks up their ass.