As the tariff spat between Washington and Ottawa escalates, the special bond between New England and our neighbors to the north is being put to the test. This week, we're exploring what this developing trade war means for our regional economy and what it could do to the close partnership New England has worked to develop with Canada for decades. Jonathan Gruber, the Ford Professor for Economics at the Massachusetts Institute of Technology in Cambridge, discusses the potential consequences of this trade war, including the impact on local small business owners and the tourism industry.