Supporters of Barack Obama and John McCain are fighting for every voter this campaign, and naturalized citizens of Hispanic descent are a growing target. In 2004, there were 4 million foreign-born Hispanics citizens of voting age. Today, that number is more than 5 million, according to an analysis of U.S. Census data by the nonprofit Pew Hispanic Center.

These new voters are especially important in swing states like Florida and New Mexico, said Jeffrey Passel, the center’s senior demographer.

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