Former Massachusetts governor and 2012 Republican presidential candidate Mitt Romney speaks at the 40th annual Conservative Political Action Conference in National Harbor, Md., in March. Jacquelyn Martin/AP hide caption

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Members of the college group Young Americans for Freedom roll up Ronald Reagan posters to hand out at CPAC in National Harbor, Md. on Friday. Jacquelyn Martin/AP hide caption

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Former Republican presidential candidate Mitt Romney leaves the stage after speaking Friday at the Conservative Political Action Conference in Maryland's National Harbor. Alex Wong/Getty Images hide caption

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Republican presidential nominee Mitt Romney during an October 2012 campaign rally in Fishersville, Va. Jewel Samad /AFP/Getty Images hide caption

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Screenshot of a 2012 TV ad, featuring actor Clint Eastwood for Mitt Romney, by the Republican group American Crossroads. Screenshot of American Crossroads Ad hide caption

itoggle caption Screenshot of American Crossroads Ad

Moderates triumphed at the '76 convention but their candidate, Ronald Reagan, lost the general election in the fall, Anthony Camerano/AP hide caption

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Among the stars of the 2002 Winter Olympics in Salt Lake City was Team USA's Apolo Anton Ohno. The city and Utah want another chance to host the games. Jacques DeMarthon /AFP/Getty Images hide caption

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President Obama and former Republican presidential nominee Mitt Romney shake hands in the Oval Office after their lunch Thursday at the White House. Pete Souza/White House Photo/UPI/Landov hide caption

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President Obama and Republican presidential candidate Mitt Romney the last time they got together, at their Oct. 22 presidential debate in Boca Raton, Fla. Saul Loeb /AFP/Getty Images hide caption

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Democratic party volunteer Matt Lattanzi worked door to door for the Obama campaign while canvassing in a Youngstown, Ohio, apartment building on Oct. 28. John Moore/Getty Images hide caption

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A sea of self-motivated individuals or a web of interdependent talents? Both, of course. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images