In the Conclave of August 1492, after having accepted that he would not be able to obtain the papal tiara for himself, Ascanio promised his vote to Rodrigo Borgia, then-Vice-Chancellor of the Holy Roman Church. Borgia promised Sforza the office of Vice-Chancellor of the Holy Roman Church, as well as the Palazzo Borgia.
In August 1492, during the Conclave, Ascanio agreed to support Rodrigo Borgia for Pope in exchange for a promise from Borgia: the position of Vice-Chancellor of the Holy Roman Church and the Palazzo Borgia.