Cross-Border Energy Trade in North America: Present and Potential Paul W. Parfomak Specialist in Energy and Infrastructure Policy Richard J. Campbell Specialist in Energy Policy Robert Pirog Specialist in Energy Economics Michael Ratner Specialist in Energy Policy Phillip Brown Specialist in Energy Policy John Frittelli Specialist in Transportation Policy Marc Humphries Specialist in Energy Policy Updated January 30, 2017 Congressional Research Service 7-. www.crs.gov R44747