Canada is by far the United States' most important trading partner, with exports to our northern neighbor totaling more than those to Mexico, Japan and China combined. Yet federal policies to reinforce security without slowing trade have had mixed results, with some border regions easing bottlenecks more than others. These and other findings on the U.S.-Canada trade relationship are published in "Border Brief," a joint effort of the Regional Institute and the Border Policy Research Institute of Western Washington University.