Mark Warner was quoted in this article about the threats to cancel NAFTA by US Presidential candidates Trump (R) & Sanders (D). (February 10, 2016) Putting aside the messy diplomatic and economic questions, Article 2205 provides that a NAFTA party can withdraw with six months notice, the trickier question is whether a congressional-executive agreement can be terminated by the President alone or whether majority votes in both houses of Congress would be required. I think the better view is that unlike with a “treaty” the President can notify the NAFTA partners on his own but unraveling the domestic commitments would require congressional action. Mr. Warner advised on NAFTA trade and investment issues as Legal Director of the Ontario Ministry of Economic Development & Trade and Ministry of Research & Innovation and participated in the Canada-European Union Trade Agreement (CETA) negotiations . Mr. Warner has advised governments on trade policy and trade negotiations and previously worked on trade and competition issues as counsel in the OECD Trade Directorate.