Trouble Behind the Scenes

In a recent article in the HuffPost, side talks between the U.S. and Japan during crucial TPP negotiations is discussed. Japanese officials reported that they were under the impression that the U.S. was representing both Canada and Mexico. Canadian and Mexican officials disputed this fact and were upset by the Japanese assumption. The negotiations were to allow more Japanese auto parts into the North American auto industry. How may Japanese relations with Canada and Mexico be affected in the future? How may U.S. relations with Canada and Mexico be affected? How may Japanese and U.S. relations be affected?