February 28, 1848
To the Senate of the United States.
In answer to the resolution of the Senate of the 24th instant, requesting to be informed whether the active operations of the Army of the United States in Mexico have been, and now are, suspended, and, if so, by whose agency and in virtue of what authority such armistice has been effected, I have to state that I have received no information relating to the subject other than that communicated to the Senate with my executive message of the 22d instant.
JAMES K. POLK.
James K. Polk, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/201422