Job number one of Canada's new Liberal government is salvaging our trade relationship with the United States. Next is the job of uniting the country — doing away with internal trade barriers and getting big projects built. All of that is the unwritten mandate of Trade and Intergovernmental Affairs Minister Dominic LeBlanc. He talks to host Amanda Lang about his plan to get to ‘zero tariffs’ with the U.S. and the need to turn down the volume on partisan politics.