The trial is held in the US Senate with the Chief Justice of the US Supreme Court presiding and all Senators voting on guilt (a two-thirds majority vote is required for conviction).
The chief justice of the US presides of the trial if the president is impeached.
If the President is the one impeached, the Chief Justice of the Supreme Court presides over the trial.
Had President Nixon been impeached, the trial would have been held in the Senate where he would have been either convicted or acquitted.
Joseph Estrada
Chef Justice of Supream Court
Johnson was impeached by the House. A trial was held in the Senate, but Johnson was not convicted and so stayed in office until his term ran out. The vote came one vote short of the 2/3 required to convict.
Chef Justice of Supream Court
To impeach a president, the House of Representatives must come up with an accusation against the president. The trial is then held by the Supreme Court with the Senate as a jury. So, both the Judicial and the Legislative branch participate in impeaching a president.
The president must be formally charged with a crime (impeached) by the House of Reps. and then must stand trial in the US Senate. If convicted, he/she is removed. Impeached does not mean removed. We have impeached two presidents, but have never removed one.
The President could be impeached and removed from office after an impeachment trial. After he was removed from office, he could then be prosecuted like any other person.
To impeach a president, the House of Representatives must come up with an accusation against the president. The trial is then held by the Supreme Court with the Senate as a jury. So, both the Judicial and the Legislative branch participate in impeaching a president.
The House of Representatives impeached President Andrew Johnson in February 1868; he was acquitted at his Senate trial in May 1868.