The articles of impeachment for Richard Nixon:
Article I, charging Nixon with obstruction of justice, alleged in part that:
On June 17, 1972, and prior thereto, agents of the Committee for the Re-election of the President committed unlawful entry of the headquarters of the Democratic National Committee in Washington, District of Columbia, for the purpose of securing political intelligence. Subsequent thereto, Richard M. Nixon, using the powers of his high office, engaged personally and through his close subordinates and agents, in a course of conduct or plan designed to delay, impede, and obstruct the investigation of such illegal entry; to cover up, conceal and protect those responsible; and to conceal the existence and scope of other unlawful covert activities.
The article also specified nine ways by which the president was alleged to have carried out the plan to obstruct the investigation.
Article II, charging Nixon with abuse of power, alleged in part that:
Using the powers of the office of President of the United States, Richard M. Nixon, in violation of his constitutional oath faithfully to execute the office of President of the United States and, to the best of his ability, preserve, protect, and defend the Constitution of the United States, and in disregard of his constitutional duty to take care that the laws be faithfully executed, has repeatedly engaged in conduct violating the constitutional rights of citizens, impairing the due and proper administration of justice and the conduct of lawful inquiries, or contravening the laws governing agencies of the executive branch and the purposes of these agencies.
The article also cited five specific examples of alleged misconduct to substantiate this charge against the president.
Article III, charging Nixon with contempt of Congress alleged in part that:
In his conduct of the office of President of the United States, Richard M. Nixon, contrary to his oath faithfully to execute the office of President of the United States and, to the best of his ability, preserve, protect, and defend the Constitution of the United States, and in violation of his constitutional duty to take care that the laws be faithfully executed, has failed without lawful cause or excuse to produce papers and things as directed by duly authorized subpoenas issued by the Committee on the Judiciary of the House of Representatives on April 11, 1974, May 15, 1974, May 30, 1974, and June 24, 1974, and willfully disobeyed such subpoenas. The subpoenaed papers and things were deemed necessary by the Committee in order to resolve by direct evidence fundamental, factual questions relating to Presidential direction, knowledge or approval of actions demonstrated by other evidence to be substantial grounds for impeachment of the President. In refusing to produce these papers and things Richard M. Nixon, substituting his judgment as to what materials were necessary for the inquiry, interposed the powers of the Presidency against the lawful subpoenas of the House of Representatives, thereby assuming to himself functions and judgments necessary to the exercise of the sole power of impeachment vested by the Constitution in the House of Representatives.