||President pro Tempore
of the Senate
|Speaker of the House
|Special||SENATE||4 March 1853||11 April 1853||Atchison||- - - -|
This Special Session of the SENATE was called by outgoing President Millard Fillmore via executive Proclamation issued on 25 February 1853.
|1st||long||5 December 1853||7 August 1854||Atchison||Boyd|
Senate President pro Tempore David Rice Atchison served as acting President of the Senate throughout this "long" session of the 33rd Congress due to a vacancy in the Vice Presidency of the United States (Vice President
William R. King having died in office on 18 April 1853, before the convening of this session).
|2nd||short||4 December 1854||3 March 1855||Cass, Lewis|
Senator Bright was elected President pro Tempore by the Senate in place of Senator Cass on 5 December 1854.
Senate President pro Tempores Cass and Bright each served as acting President of the Senate due to a vacancy in the Vice Presidency of the United States throughout this "short" session of the 33rd Congress (Vice
President William R. King having died in office earlier in this Congress)