Impeachable a. : That may be impeached; liable to impeachment; chargeable with a crime.

Example:
Do you think lying about reasons to go to war is an Impeachable offence?

Taxonomy
impeachment, President, office, Senate, Constitution, the House of Representatives, defendant, 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:
... If an impeachment attempt is unsuccessful or the official is acquitted, no new cases can be filed against that impeachable official for at least one full year. ...