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POPSA History of North American Union There are three convenors or co-convenors for this. On the U.S. side it's former Secretary of State Schultz, on the Mexican side it's former Finance Minister Pedro Aspe, and on the Canadian side it's the former Premier of Alberta Peter Lougheed. The first session was held last year in Sonoma. This year it's held in Banff. Next year it will be held in Mexico.