Corn is big business in Iowa, which has usually made anything but support for ethanol subsidies off-limits for presidential hopefuls. Steve Pope/AP hide caption

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Former Massachusetts Gov. Mitt Romney focuses on a key issue — corn — in Ankeny, Iowa, on Friday, as he prepares to launch his 2012 presidential bid. Charlie Neibergall/AP hide caption

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George Romney with his wife, Lenore, and teenage son Mitt, after announcing he would seek the Republican nomination for governor of Michigan at a press conference in 1962. AP hide caption

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Republican Sen. Rand Paul of Kentucky sharply criticized the Obama administration's decision to intervene in Libya. Brendan Hoffman/Getty Images hide caption

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In a photo released by NBC News, Secretary of State Hillary Clinton and Secretary of Defense Robert Gates discuss Middle East policy on Meet the Press. William B. Plowman/AP hide caption

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Karen Wallace (right) and Meryleigh Brainerd (left), both teachers in California, join in a candlelight vigil in front of the state Capitol to express solidarity with union members in Wisconsin. Decades ago, says a labor historian, the typical unionized worker was a blue-collar male. Now, it's more likely to be a schoolteacher. Robert Durell/AP hide caption

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President Ronald Reagan campaigns for his economic policies in 1987 before a sign that reads "Truth in Spending, Americans Deserve It." Mike Sargent/AFP/Getty Images hide caption

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The crowd cheers during last year's Conservative Political Action Conference in Washington. Jose Luis Magana/AP hide caption

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In his inaugural address on Jan. 10, Ohio Gov. Kasich said: "Get ready for an exciting time. Put on the seat belt because we're going." Kasich has to find ways to account for a projected $8 billion shortfall by mid-March. Tony Dejak/AP hide caption

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Reince Priebus of Wisconsin was elected chairman of the National Republican Committee on Friday. Alex Wong/Getty Images hide caption

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Republican National Committee Chairman Michael Steele faces a tough re-election battle. His four rivals have vowed to reverse the RNC's fundraising woes. Saul Loeb/AFP/Getty Images hide caption

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House Speaker John Boehner of Ohio participates in a ceremonial swearing in with Rep. David Schweikert (R-AZ) on Capitol Hill in Washington on Wednesday. Charles Dharapak/AP hide caption

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Former Speaker of the House Newt Gingrich, shown in May, is trying to reach out to Latinos with a new website and a forum this week. Chip Somodevilla/Getty Images hide caption

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