President Nixon would have been impeached and removed from office if he failed to resign because of the charges against him about obstruction of Watergate Scandal's investigation.
Nixon was impeached because he was involved in obstruction of Watergate Scandal investigation and this later led to his impeachment.
President Nixon was charged with obstruction of justice as regards the investigation of the Watergate break-in as well as abuse of power.
These charges are enough for his impeachment or fir him to resign honorably.
Learn more about President Nixon at;
https://brainly.com/question/22417279