This talk, by Dr. David Adler, president of the Alturas Institute and constitutional scholar, explores the origins and practice of the impeachment power, from the Constitutional Convention through its discussion and use in impeachment efforts against Andrew Johnson, Richard Nixon and Bill Clinton, among others. This discussion probes the concept of impeachable offenses—treason, bribery and high crimes and misdemeanors—in historical context and addresses presidential actions that might warrant impeachment.