Despite making modest progress on challenging management and security issues common to their shared border, the United States and Canada have, in recent years, slipped behind on advancing a progressive border agenda. The momentum unleashed under the 30-point Smart Border Action Plan, signed in late 2001, has slowed in the face of new regulations at the border, many of which were initiated by the United States. These include significant changes in US admission procedures under the Western Hemisphere Travel Initiative (WHTI), new border policing resources and protocols, as well as new customs and inspection fees. The much-heralded Security and Prosperity Partnership of North America (SPP), designed to facilitate both trade and security between the two countries, has also lost momentum, with the last trilateral meeting of leaders resulting in little more than a press release. As a result of these and other developments, it appears that rather than “thinning,” the US-Canada border is “thickening” at precisely the time when greater economic and security cooperation is necessary to bolster North American competitiveness in an increasingly globalized economy and complex security environment. This article will investigate some of the key reasons behind these policy developments, exploring some of the early positions that frame approaches to border management in the Obama administration. It will also offer some thoughts on opportunities for improved border management policies by providing some specific recommendations, which may help advance solutions to pressing - and festering - bilateral security and trade issues. [ABSTRACT FROM AUTHOR]