AdvertisementAt NAFTA Kickoff, U.S., Mexico And Canada Already Show Signs Of DisagreementAugust 16, 2017Danielle KurtzlebenfacebookEmailU.S. Trade Representative Robert Lighthizer (left) shakes hands with Canadian Foreign Affairs Minister Chrystia Freeland, accompanied by Mexico's Secretary of Economy Ildefonso Guajardo, after they spoke at a news conference Wednesday at the start of NAFTA renegotiations in Washington, D.C. (AP)