Richard Nixon, daughter Tricia and wife, Pat, board Air Force One after his resignation, Aug. 9, 1974. Bettmann/CORBIS hide caption

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President Obama participates in an AARP tele-town hall on health care in July 2009. The seniors group lobbied hard for the president's health care law. Now, Republicans say the group stands to make a healthy profit from the law. Haraz N. Ghanbari/AP hide caption

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A mother and daughter at the Unity Health Care's Upper Cardozo clinic in Washington, D.C. at a celebrity event in 2009. The clinic relies on some funding from the Title X Family Planning Program. Kris Connor/Getty Images hide caption

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In some parts of the country, like San Diego (above), gas prices are above $4 a gallon. Some Republicans are trying to tie those higher prices at the pump to President Obama's energy policies. Gregory Bull/AP hide caption

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Tea Party supporters hold signs across from a rally held by the American Federation of State, County and Municipal Employees in front of the Maryland State Capitol building in Annapolis on March 14. Mark Wilson/Getty Images hide caption

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