Question: who acts as the jury in an impeachment trial

title: Impeachment
text: The hearing resembles an ordinary trial : both sides may call witnesses and present evidence . At the end of the hearing the lords vote on the verdict , which is decided by a simple majority , one charge at a time . Upon being called , a peer must rise and declare `` guilty , upon my honour '' or `` not guilty , upon my honour '' . After voting on all of the articles has taken place , and if the Lords find the defendant guilty , the Commons may move for judgment ; the Lords may not declare the punishment until the Commons have so moved . The Lords may then decide whatever punishment they find fit , within the law . A royal pardon can not excuse the defendant from trial , but a pardon may reprieve a convicted defendant . However , a pardon can not override a decision to remove the defendant from the public office they hold . History