NAUWATCH-Perimeter Security And The Future Of North American Integration http://www.vivelecanada.ca/article/235930946-perimeter-security-and-the-future-of-north-american-integration

Out of the ashes of the defunct Security and Prosperity Partnership (SPP), the U.S. has pursued simultaneous bilateral agendas with both Canada and Mexico, in an effort to further deepen North American economic and security integration. While the NAFTA framework remains intact, a recent announcement by Canada and the U.S. to work towards a trade and security perimeter agreement without Mexico, has some questioning the future of the whole trilateral process.