Similarly, the 1844 election turned out to be effectively a referendum on War with Mexico.

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Democrat James Polk wanted to annex Texas, a policy the Whig candidate Henry Clay warned would provoke war with Mexico.

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It had also led to a war with Mexico, by which the United States acquired a huge triangle of land bounded by California and Texas.

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In the 100 years since the Mexican Revolution, one part of Mexico has often been at war with another: urban vs. rural, rich vs. poor and, yes, dark-skinned vs. light-skinned.

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The major casualties in this currency war are developing countries with trade deficits, such as Brazil, Mexico, and India.

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Mexican Foreign Secretary Patricia Espinosa said the Merida program presents the United States and Mexico with a chance for "unprecedented" cooperation in the war against drugs.

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Another was added after Spain went to war with Britain in 1804, and tried to increase its colonial revenues, especially from Mexico.

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The violence in Monterrey, the result of a turf war between several drug cartels, is causing particular alarm among U.S. businesses with operations in Mexico.

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