Position established The office of president pro tempore was established by the
Constitution of the United States in 1789. Between 1792 and 1886, the president pro tempore was second in the line of
presidential succession, following the vice president and preceding the speaker. Through 1891, the president pro tempore was appointed on an intermittent basis only, when the vice president was not present to preside over the Senate, or at the adjournment of a session of Congress. The first president pro tempore,
John Langdon, was elected on April 6, 1789, presiding over sessions, signing legislation, and performing routine administrative tasks. Whenever the office of the vice presidency was vacant, as it was on ten occasions between 1812 and 1889, the office garnered heightened importance, for although he did not assume the vice presidency, the president pro tempore stood next in line for the presidency. Before the ratification of the Twenty-fifth Amendment in 1967, a vacancy in the vice presidency could be filled only by a regular election; several individuals who served during these vacancies were referred to informally as "acting vice president". is the only Senate president pro tempore to later become
President of the United States. On three occasions during the 19th century, the Senate was without both a president and a president pro tempore: • from July 9 to July 11, 1850, following
Millard Fillmore's accession to the presidency upon the death of
Zachary Taylor, until
William R. King was elected president pro tempore; • from September 19 to October 10, 1881, following
Chester Arthur's accession to the presidency upon the death of
James A. Garfield, until
Thomas F. Bayard was elected president pro tempore; • from November 25 to December 7, 1885, following the death of Vice President
Thomas A. Hendricks, until
John Sherman was elected president pro tempore.
Vice President Henry Wilson died on November 22, 1875. Senator
Thomas W. Ferry, being President pro tempore of the Senate, was next in the
line of presidential succession, and remained so until March 4, 1877. As acting president of the senate, he presided over the 1876
impeachment trial of
U.S. Secretary of War William Belknap and the meetings of the
Electoral Commission created by Congress to resolve the disputed
1876 presidential election. Still president pro tempore at that time, he would have temporally become the
acting president had the
Electoral College vote not been certified by March 4, 1877; Congress certified
Rutherford B. Hayes as the winner of the Electoral College vote on March 2. The president pro tempore and the speaker of the House were removed from the
presidential line of succession in 1886. Both were restored to it in 1947, though this time with the president pro tempore following the speaker. Historically, presidents pro tempore would preside over any
joint session of the United States Congress alongside the speaker of the house when there was a vacancy in the vice presidency. With the ratification of the
Twenty-fifth Amendment to the United States Constitution in 1967, vacancies in the vice presidency became much less common. However, a need for the president pro tempore to preside came in September 2001, following the 9/11 terrorist attacks. Due to heightened security concerns during President
George W. Bush's September 20 address to Congress, Vice President
Dick Cheney stayed at another location as a
designated survivor, and President Pro Tempore
Robert Byrd presided in his absence. ==Related officials==