A trio of rail shipper groups, each with a vested interest in the long-term future in the North American Free Trade Agreement (NAFTA) penned a joint letter to the United States Trade Representative Robert Lighthizer, Canada’s Minister of Foreign Affairs Chrystia Freeland, and Mexico’s Secretary of Economy Ildefonso Guajardo to express their support for NAFTA, as well as call for a constructive effort to renegotiate a new agreement building on the existing framework and progress, the United States, Canada, and Mexico, have made as trading partners.