Honestly, it is difficult for me to say anything else than what Mr. Shrybman said. We have seen the same thing in the past. The exemptions provided for presently are not something that the United States will let go.
Last week, Mr. Grenier traced the history of trade negotiations between Canada and the United States, including the origins of this treaty on government procurement. He explained clearly why Canada did not sign off on and accept reciprocity: there were too many exemptions and they were too expensive. It was impossible to reach an agreement that works to the benefit of Canadian businesses. They would have been at a disadvantage compared to American firms wanting to bid here. To be honest, I do not see how that could happen in the future and how reciprocity could be achieved.