became the first person to succeed to the presidency intra-term upon the death of
William Henry Harrison. Although the Presidential Succession Clause in Article II of the Constitution clearly provided for the vice president to take over the "powers and duties" of the presidency in the event of a president's removal, death, resignation, or inability, left unclear was whether the vice president became president of the United States or simply
temporarily acted as president in a case of succession. The hypothetical debate about whether the office or merely the powers of the office devolve upon a vice president who succeeds to the presidency between elections became an urgent constitutional issue in 1841, when President
William Henry Harrison died in office. Vice President
John Tyler claimed a constitutional mandate to carry out the full powers and duties of the presidency, asserting he was the president and not merely a temporary acting president, by taking the
presidential oath of office. Many around him—including
John Quincy Adams,
Henry Clay and other members of Congress, Tyler's view ultimately prevailed when the House and Senate voted to accept the title "President". Two situations are noteworthy: • On July 2, 1881, President
James A. Garfield was shot; hit from behind by two bullets (one grazing his arm and the other lodging in his back). The president wavered between life and death for 79 days after the shooting; it was the first time that the nation as a whole experienced the uncertainties associated with a prolonged period of presidential inability. Vice President
Thomas R. Marshall, the cabinet, and the nation were kept in the dark over the severity of the president's illness for several months. Marshall was pointedly afraid to ask about Wilson's health, or to preside over cabinet meetings, fearful that he would be accused of "longing for his place". Though members of both parties in Congress pledged to support him if he asserted his claim to the presidential powers and duties, Marshall declined to act, or to do anything that might seem ambitious or disloyal to Wilson. At a time when the fight over joining the
League of Nations was reaching a climax, and domestic issues such as strikes, unemployment, inflation and the threat of Communism were demanding action, the operations of the executive branch were once more hampered by the lack of constitutional basis for declaring that the president was unable to function. When President
Dwight D. Eisenhower suffered a heart attack in September 1955, he and Vice President
Richard Nixon developed an informal plan authorizing Nixon to assume some administrative duties during Eisenhower's recovery. Although it did not have the force of law, the plan helped to reassure the nation. The agreement also contained a provision whereby Eisenhower could declare his own inability and, if unable to do so, empowered Nixon, with appropriate consultation, to make the decision. Had it been invoked, Nixon would have served as acting president until the president issued a declaration of his recovery. Moved forward as a consequence of President Kennedy's November 1963 assassination, this informal plan evolved into constitutional procedure a decade later through Sections 3 and 4 of the Twenty-fifth Amendment, which resolved the uncertainties surrounding presidential disability. == Presidential succession by vice presidents ==