美国，墨西哥，中美洲。  （按Sylodium， 全球 进口出口 目录中）。

Barack Obama president of US (1º in the ranking world in total GDP with 15.685 billion dollars) has visited Mexico (11º: 1.759 billion.), with the focus on fighting drug cartels, to increase trade and investment between both countries.

Obama broadly endorsed the latter’s program to open up Mexico’s telecommunication and oil sectors to foreign investment.

Both countries are interested in the strategy of of building a North American economic bloc like partners of the European Union.

Mexico is US’s second-largest trading partner.

Obama, also has been in Costa Rica (85º in world ranking: 60 billion. total GDP)   to meet with all the American Central countries, that in order by more GDP "per capita" are: 巴拿马 (87º in world ranking: 57 billion of total GDP) , 哥斯达黎加, 在多米尼加共和国 (70º  : 100 billion), 伯利兹 (162º : 3 billion.) 萨尔瓦多 (93º : 46 billion),  危地马拉 (77º : 80 billion) , 洪都拉斯 (99º : 38 billion )  and 尼加拉瓜 (124º : 20 billion).

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