Contents: (1) Introduction; (2) Background: The Constitutional Framework; Judicial Decisions Related to Impeachment; Some Basic Research Tools to Assist in Impeachment Proceedings; A Brief History and Some Preliminary Issues Relating to Impeachment; Who Are ¿Civil Officers of the United States¿ Under Article II, Sec. 4 of the Constitution?; What Kinds of Conduct May Give Rise to an Impeachment?; (3) Conclusions and Other Observations.