Impeacher n. : One who impeaches.

Example:
if you had were a voter at the time of Nixon's Impeacher and resignation?

Taxonomy
impeachment, President, office, Senate, Constitution, defendant, the House of Representatives, president impeached, United States, conviction, judge, impeachment proceedings, power, impeachment trial, Vice President, members of Congress, impeachment process, two-thirds majority.

Defination from the web:
... An official who is impeached faces a second legislative vote (whether by the same body or another), which determines conviction, or failure to ...