President Obama waves after signing the Affordable Care Act at the White House on March 23, 2010. Chip Somodevilla/Getty Images hide caption

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President Obama and John Brennan, his top counterterrorism adviser, in the Oval Office on Jan. 4, 2010. Brennan is a key voice about who gets put on the "kill list." Pete Souza/White House hide caption

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A 'Macabre' Process: Nominating Terrorists To Nation's 'Kill List'

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President Obama meets with actor George Clooney, U.S. Special Envoy for Sudan Princeton N. Lyman, and human rights activist John Prendergast (far left) at the White House on March 15. Pete Souza/White House hide caption

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A bilingual sign announces a polling place in the 2008 general election on November 4 in Phoenix, Ariz. David McNew/Getty Images hide caption

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GOP Intensifies Its Outreach To Latino Voters Focusing On The Economy

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A campaign worker hangs a sign at a campaign stop for Republican presidential candidate Mitt Romney in Lorain, Ohio, on Thursday. Jae C. Hong/AP hide caption

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President Obama's re-election campaign has released four new Spanish-language ads, each ending with the phrase: "Esta eleccion si importa," which in English means, "This election does matter." barackobama.com hide caption

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Mitt Romney holds a flier titled "Women & The Obama Economy" as he speaks in Hartford, Conn., Wednesday Steven Senne/AP hide caption

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President Obama has a chance to make fun of his opponents — and himself — when he addresses the annual White House Correspondents' Association gala later this month. Last year he joked about Donald Trump and the "birther" issue. Martin H. Simon-Pool/Getty Images hide caption

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Not Just For Laughs: Why Humor Can Be A Powerful Campaign Tool

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President Obama waves after speaking at a UPS facility in Las Vegas on Thursday. Nevada is one stop on the president's latest road trip focusing on the economy. Julie Jacobson/AP hide caption

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Opposing Candidates Favor Similar Economic Solution: Worker Retraining

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President Obama tours Conveyor Engineering and Manufacturing in Cedar Rapids, Iowa, on Wednesday. Jewel Samad/AFP/Getty Images hide caption

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Taking His Economic Message On The Road, Obama Touts Factory Jobs In Iowa

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