The fourth round of NAFTA negotiations are wrapping up amid a number of areas of potential impasse. These include automotive rules of origin, a “sunset” clause, voluntary dispute settlement arrangements and dairy market access. Individually they may not sink the deal, but could lead talks to drag into 2018. The U.S. proposal to cut Canadian dairy and poultry quotas over 10 years is seen as “unacceptable”. That comes as Canada has already granted the EU extra access under the CETA deal and dairy imports already increased 11% in the past year. U.S. exports of dairy and poultry fell 15% ann...