Mark Warner was featured in the Financial Post about Trump’s threat to use Section 891 of the U.S. Internal Revenue Code to double corporate taxes on Canadian companies operating in the United States in retaliation for discriminatory digital services taxes, including Canada’s proposed DST, how it relates to other potential trade remedies like Section 301 of the Trade Act of 1974 to impose trade sanctions on foreign countries that violate U.S. trade agreements or engage in acts that are “unjustifiable” or “unreasonable” and burden U.S. commerce, and the risks to Canadian citizen and corporations in the U.S. (January 24, 2025) Mr. Warner is a Canadian and U.S. lawyer who has practiced in Toronto, Washington, D.C., New York and Brussels. Mark also previously worked on trade and competition issues as counsel in the OECD Trade Directorate where he participated in the negotiations of the Multilateral Agreement on Investment and represented the OECD at meetings of the WTO Working Group on Trade and Competition Policy and the Working Group on Trade and Investment.

As Legal Director of the Ontario Ministry of Economic Development & Trade, Mark led Ontario’s legal team for the negotiation of the Canada-U.S. Agreement on Government Procurement, advised on trade disputes (including the Green Energy Act and softwood lumber) and various NAFTA Chapter 11 investor-state arbitration matters. He also led the Ontario’s legal team for the insolvency / restructuring of General Motors and Chrysler, and various grant and loan agreements to leading automotive and automotive parts companies, including to electric car battery manufacturer, Electrovaya and a Better Place demonstration centre and electric vehicle charging station network, and more recently has assisted with an electrical vehicle battery manufacturing contractual dispute.

Mark is a past Chair of the International and Economics Committees of the American Bar Association Section of Antitrust Law as well as a member of the Section’s Task Forces on Competition Policy and NAFTA and Antitrust in the Global Economy. In addition to being a lawyer, Mr. Warner has a Masters Degree in Economics from the University of Toronto.