Why was the 25th amendment proposed?

The 25th Amendment was proposed to deal with the aftermath of the assassination of President John F. Kennedy and the subsequent succession of his vice president.

Explanation:

The Twenty-fifth Amendment to the United States Constitution deals with issues related to presidential succession and disability. It clarifies that the vice president becomes president if the president dies, resigns, or is removed from office; and establishes procedures for filling a vacancy in the office of the vice president and for responding to presidential disabilities. The Twenty-fifth Amendment was submitted to the states on July 6, 1965, by the 89th Congress and was adopted on February 10, 1967.