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

itoggle caption CBS/AP

Sept. 27, 1994: Then-House Minority Whip Newt Gingrich and other Republicans unveil their "Contract with America" at a Capitol Hill rally. John Duricka/AP hide caption

itoggle caption John Duricka/AP