A supporter of President Barack Obama raises his arms as it is announced that Obama was re-elected during an election night watch party in Chicago. Jerome Delay/AP hide caption

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Karl Rove, former adviser to President George W. Bush, speaks last year in Corpus Christi, Texas. Rove is the chief fundraiser for the biggest outside spender this election season: the twin groups American Crossroads and Crossroads GPS. Michael Zamora/AP hide caption

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Rep. Michele Bachmann, R-Minn., speaks during the Family Research Council Action Values Voter Summit last month in Washington. Mandel Ngan/AFP/Getty Images hide caption

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President Richard Nixon faced television cameras in the Oval Office on April 30, 1973 to announce the departure of his two closest assistants in the deepening Watergate scandal. CBS/AP hide caption

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