To the Senate of the United States:
Lieutenant-General Scott has advised me that while he would cheerfully accept a commission as additional minister to Mexico, with a view to promote the interests of the United States and of peace, yet his infirmities are such that he could not be able to reach the capital of that country by any existing mode of travel, and he therefore deems it his duty to decline the important mission I had proposed for him. For this reason I withdraw the nomination in this respect heretofore submitted to the Senate. It is hardly necessary to add that the nomination was made without any knowledge of it on his part.
Abraham Lincoln, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/203175