Former Republican presidential candidate Mitt Romney spoke at the Washington Ideas Forum with James Bennet of The Atlantic on Wednesday. Win McNamee/Getty Images hide caption

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Pope Francis is greeted by President Obama after arriving outside Washington, D.C., on Tuesday. Chip Somodevilla/Getty Images hide caption

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Gov. Scott Walker, R-Wis., holds up a $1 bill during a town hall in Las Vegas where he announced his plan to take on labor unions. Isaac Brekken/AP hide caption

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