The Globe and Mail reports in its Monday, Sept. 25, edition that U.S. corporations operating in Canada are warning that President Donald Trump's protectionist trade policies could hurt their cross-border business while uncertainty about the future of NAFTA is impeding investment decisions. The Globe's Shawn McCarthy and Steven Chase write that a survey of 53 companies said their biggest concerns about the bilateral trading relationship involve U.S. protectionism. These worries include the potential for major changes to, or even abrogation of, the North American free-trade agreement and the prospect for Buy American provisions. The survey was conducted by Nanos Research for the American Chamber of Commerce. Some business leaders say they see evidence of a "chill" on investment decisions as companies await a clearer sense as to whether the NAFTA talks will founder and Mr. Trump follows through on his threat to abrogate the treaty, or it faces a major overhaul with some protectionist demands from the United States built into it, or it undergoes only modest changes. Corporate leaders in Canada, Mexico and the U.S. are increasing their lobbying efforts to maintain the key elements of the existing NAFTA.