Jeffrey A. Engel is the founding director of the Center for Presidential History at Southern Methodist University. Educated at Cornell, Oxford, the University of Wisconsin-Madison, and Yale University. He has authored or edited ten books on American foreign policy.
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Four experts on the American presidency examine the first three times impeachment has been invoked—against Andrew Johnson, Richard Nixon, and Bill Clinton—and explain what it means today. Impeachment is a double-edged sword. Though it was d... SEE MORE