July 10, 1850
To the Senate of the United States:
In consequence of the lamented death of Zachary Taylor, late President of the United States, I shall no longer occupy the chair of the Senate, and I have thought that a formal communication to the Senate to that effect, through your Secretary, might enable you the more promptly to proceed to the choice of a presiding officer.
MILLARD FILLMORE.
Millard Fillmore, Communication to the Senate From Mr. Fillmore Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/200759