Wisconsin Gov. Scott Walker (R) after his victory Tuesday. Scott Olson/Getty Images hide caption

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NPR's Don Gonyea, reporting on 'Morning Edition'

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Republican presidential candidate Mitt Romney on Tuesday in Las Vegas. Justin Sullivan/Getty Images hide caption

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Ari Shapiro, reporting on 'Morning Edition'

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Keith Judd, federal prisoner and presidential candidate, in 2008. Beaumont Enterprise, courtesy of Keith Judd/AP hide caption

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