who is presiding officer for impeachment trials against the president of the phil
Impeachment in the Philippines If the President of the Philippines is on trial, such as in 2001, the Chief Justice of the Supreme Court of the Philippines shall preside but not vote.
Chief Justice of the United States The Chief Justice leads the business of the Supreme Court and presides over oral arguments. When the court renders an opinion, the Chief Justice—when in the majority—decides who writes the court's opinion. The Chief Justice also has significant agenda-setting power over the court's meetings. In the case of an impeachment of a President of the United States, which has occurred twice, the Chief Justice presides over the trial in the U.S. Senate. Additionally, the presidential oath of office is typically administered by the Chief Justice (although the Constitution does not assign this duty to anyone in particular).