||President pro Tempore
of the Senate
|Speaker of the House
|Special||SENATE||4 March 1851||13 March 1851||King||- - - -|
This Special Session of the SENATE was called by President Millard Fillmore via executive Proclamation issued on 3 March 1851.
|1st||long||1 December 1851||31 August 1852||King||Boyd, Linn|
|2nd||short||6 December 1852||3 March 1853||Atchison, D.R.|
Senate President pro Tempores King and Atchison each served as acting President of the Senate throughout the entirety of the 32nd Congress due to a vacancy in the Vice Presidency of the United States (Vice President Millard Fillmore having succeeded to the Presidency during the preceding Congress).