Answer:It was because there was no exact procedure or process as stated by the U.S. constitution on the replacement of the president when it is assassinated or incapacitated, thus the amendment was proposed to solve the dilemma.
The 25th Amendment was formulated after the assassination of President John F. Kenedy. It was because there was no exact procedure or process as stated by the U.S. constitution on the replacement of the president when it is assassinated or incapacitated, thus the amendment was proposed to solve the dilemma.