Canada’s greatest advocate considers our place in Bush’s world order.Not since 1984, when Brian Mulroney went to New York and told a blue-chip business audience that Canada was “open for business,” has there been such a push toward continental integration and a common market for North America. The big business community is eager to use the fear of terrorism to erase the border between our two countries as much as possible. The only conceivable way to do this, as far as the U.