I appreciate the question, and I think there is an ideological bit to this, too. If Canada said tomorrow that it would institute a Buy Canadian policy for rolling stock, for example, similar to, or even to the letter of, the current Buy American policy for rolling stock, there might be differences of opinion on that. But I would have a very hard time seeing how the United States could then justify triggering a trade war when what we had done was to equalize the playing field in that particular industry.
On April 1st, 2010. See this statement in context.