^^^Calderon needs to keep on Obama's good side (aid to Pemex, for example), and needs to paint the US as a source of trouble so the gross ineptitude/corruption of Mexican government(s) might be overlooked. Mexico also wants to join, as does Canada, another free trade group which the US belongs to and which, for some unaccountable reason, the US is blocking. The Canadians are talking about selling us energy at world prices instead of with a NAFTA discount as retaliation, while Calderon apparently thinks licking the boot is a fruitful path.
Loyalty to petrified opinions never yet broke a chain or freed a human soul in this world — and never will.
— Mark Twain