WASHINGTON - Never fond of interrupting his Texas vacation, President Bush is doing it this year to bolster ties with the leaders of Canada and Mexico, two friendly neighbors and vital partners. Bush joins Canadian Prime Minister Stephen Harper and Mexican President Felipe Calderon in Montebello, Quebec, on Monday in hopes of expanding cooperation among their countries, which enjoy the largest trading partnership in the world. The two-day North American Leaders' Summit appears to lack a signature issue, except perhaps a new U.S. push to halt Mexico's bloody drug wars. Instead, the broad theme is economic prosperity, built around several topics: border security, competitiveness with India and China, product safety and energy solutions. <snip> "What's really important is that they continue to reflect the significance of North American integration — the fact that there are post 9/11 problems, but they aren't going to undermine trade and investment," said Charles Doran, a scholar at John Hopkins University's School of Advanced International Studies. Associated Press North American Leaders' Summit? North American integration? Do we get to elect the leader of North America?