A portrait of then-Sen. Warren G. Harding a few years prior to being elected president in 1920. Harding typically ranks near the bottom of U.S. presidents — but a steamy trove of love letters is putting him back in the public eye. Library of Congress hide caption

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President Obama waves before boarding Air Force One prior to his departure from Andrews Air Force Base on June 26. Jose Luis Magana/AP hide caption

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Sen. Mary Landrieu, D-La., talks with her father, former New Orleans Mayor Moon Landrieu, on Feb. 1. The two appear together in recent television ads for her re-election campaign. Gerald Herbert/AP hide caption

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President Obama speaks to troops at Fort Bragg, N.C., in December 2011. Gerry Broome/AP hide caption

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